See the collection of Statistics solutions available
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[Solved] What happens to the mean, standard deviation, and variance when you add or multiply by a constant? #11498
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[Solution] How do you define the range of a series of numbers? Examples are OK. #11499
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[Solved] What is the standard deviation in words? By formula? #11500
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[Solution] Someone said that statistics are inferential. What does that mean? Use terms like parameter and samp #11501
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[Solution] What are percentile points and percentile ranks, and what are the differences? #11502
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(Solved) A statistics class test has a mean score of 76 and a standard deviation of 12. What is the variance? #11503
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[Solved] With a mean or 60 and a SD of 15, what score would be at the 75th percentile? 50th? 95th? 10th? What #11504
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[Solution] What is the normal distribution? #11505
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[Solved] What are z scores? #11506
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[Solved] Given a regression line that passes through the points (5,0) and (0,5): a. Sketch the graph of the r #11507
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[Solution] In what way does the regression constant b indicate the “direction” of the relationship? #11509
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[Solved] What is the meaning of the “least-squares criterion” for finding a line of best fit for the regressi #11510
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(Solved) What is the meaning and usefulness of the standard error of estimate? #11511
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[Solution] Explain what is meant by the term “homoscedasticity.” #11512
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(See Solution) A researcher observes a correlation of .67 between xenophobia (negative attitude towards outgroups) #11513
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[Solved] What is the interpretation of r = 0? #11514
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[Solution] Why are there usually two regression lines but only one correlation for a pair of variables X and Y? #11515
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(Solved) Why is it that the correlation coefficient is identical to the slope of the regression line when the #11516
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Solution: A researcher found a high correlation in grades K-12 between height and mathematics achievement, and #11517
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[Solved] Two researchers are interested in studying the relationship between college grades (GPA) and reasoni #11518
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[Solved] What three things determine the quality of inferential statistics? #11519
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[Solved] What is a simple random sample? #11520
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[Solution] Assuming a normal population distribution with ? = 100 and ?x = 16, what is the probability of obtai #11521
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[Solution] Scores on a standardized achievement test are normally distributed. If all the children of selected #11522
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[Solution] What is a sampling distribution? How does an empirical sampling distribution differ from a theoretic #11523
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[Solution] What is the standard error of the mean? How is it related to the standard deviation of a sample? To #11524
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[Solved] Determine if a mean of 30 based on a sample of 9 is significantly different from a population mean o #11525
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[Solved] What if the population standard deviation is not known, but the sample standard deviation is 8? #11526
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Solution: Assume that the number of spots showing on the tops of a fair pair of dice is normally distributed w #11527
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[Solved] Using the same new pair of dice, assume that more data show a mean value of 7.6 after 100 tosses of #11528
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[Solved] Define degrees of freedom. #11529
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[Solution] What is meant by a critical value of the t distribution? #11530
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[Solved] Determine whether a mean of 116 based on a sample of 36 is significantly different from a population #11531
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[Solved] Repeat assuming the population standard deviation was not known but the sample standard deviation wa #11532
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[Solved] The average stature of indigenous adult males on a particular island chain is 155 cm. One island on #11533
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[Solved] The anthropologist wishes to test the intellectual ability of the inhabitants of the deprived island #11534
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(See Solution) What are the two statistical assumptions that are made about the population when testing an hypothes #11535
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[Solution] Distinguish between the two types of decision errors: type I and type n errors. #11536
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[Solved] Relate the idea of false negatives and false positives to type I and type II errors. #11537
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[Solved] What is the basis for deciding between a directional and a nondirectional test? #11538
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Solution: What is the difference between: (1) the difference between two sample means, and (2) the mean differ #11539
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[Solution] What is wrong with interpreting the failure to find a significant r value as proof that no relations #11540
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[Solution] Why does the t test for the significance or r have N - 2 degrees of freedom? #11541
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[Solution] Know when it would be best to use a t test for independent and when for correlated samples. #11542
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(Solved) What are the assumptions that are made when testing the difference between means for independent gro #11543
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(Solved) What is the Analysis of Variance, in words? What does it do and how does it go about doing it? Use a #11544
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(Solved) A psychologist wanted to determine the differential effects of a near-Eastern therapy on college gra #11545
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[Solution] Determine the 95% confidence interval for the following cases. a. Mean X = 50, sX = 10, N = 25 b. r #11546
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[Solved] An independent panel rated students on potential for success and willingness to take risks. The resu #11547
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Solution: “All I care about is if I get statistical significance. As long as I reach the .05 level my findings #11548
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[Solution] What is a power analysis, what is needed for one, and why would one want to conduct one? #11549
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Solution: What does “size of the effect” refer to and what is its importance in research? #11550
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[Solution] Using your own words describe what, for researchers, is a population. (2 points) #11556
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Solution: Now, again using your own words, describe a sample. #11557
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Solution: The cover sheet for your General Social Survey Codebook provides you with detailed information about #11558
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[Solved] What have you learned about your 1998 sample group from the values in your two tables? Write a two-p #11559
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[Solved] Calculate all three measures of central tendency for your ratio scale variable. You may use your dat #11560
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[Solution] Now, looking at what your table tells you about the shape of the distribution for your ratio scale v #11561
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(Solved) Writing entirely in words, no symbols, what did you learn about your sample group from this best mea #11562
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[Solved] What do you think about what you learned about your sample group from the measures of central tenden #11563
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(Solved) Considering what you have learned about the measures of central tendency, what is the most appropria #11564
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(See Solution) Take a look at your table. What is the value for this measure of central tendency for your nominal s #11565
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[Solution] What is the most appropriate measure of variability for your ratio scale variable? (2 points) #11566
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[Solution] Why is it the most appropriate measure? (2 points) #11567
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[Solved] Under what circumstances would it be appropriate to also use other measures of variability and what #11568
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(See Solution) Calculate the range and standard deviation for your ratio scale variable . Again, you may use your d #11569
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(See Solution) Create a small APA style table to present the mean and standard deviation for the ratio scale variab #11570
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[Solved] Why is it important to consider BOTH central tendency and variability together to get an accurate pi #11571
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(Solved) Reflecting on what the Z-scores tell you, what do you now think about how well this person represent #11573
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[Solution] The American Automobile Association checks the prices of gasoline before holiday weekends. List belo #11574
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[Solution] The accounting dept of Weston Materials Inc a national manufacturer of unattached garages reports th #11578
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[Solved] The number of passengers on the Carnival sensation during one week cruise in the Caribbean follows t #11579
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[Solution] In establishing warranties on HDTV sets the manufactures wants the set the limits so that few will n #11580
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Solution: Owens Orchards sells apples in a large bag by weight. A sample of seven bags contained the following #11581
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(See Solution) The weights (in pounds) of a sample of five boxes being sent by UPS are 12,6,7,3 and 10 a. Compute #11582
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[Solved] Suppose that you are an operations analyst for Chase Bank. As part of your rotation thro #11621
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(Solved) Shao Industries is considering a proposed project for its capital budget. The company estimates that #11625
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[Solved] A researcher believes that there is no differences in religiosity of people of different party affil #11626
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[Solution] A statistics instructor is concerned about his students' confidence in their math skills might diffe #11627
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(Solved) A physiologist has conducted an experiment to evaluate the effect of a synthetic hormone on sexual b #11628
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(Solved) Eysenck conducted a study that investigated whether recall would differ depending on five different #11629
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Solution: A neuroscientist suspects that low levels of the brain neurotransmitter serotonin may be casually re #11630
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Solution: Since muscle tension in the head region has been associated with tension headaches, you reason that #11631
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[Solved] A group of stroke patients performed a maze task, to assess their cognitive functioning following th #11632
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[Solution] A CEO of a large pharmaceutical company would like to determine if he should be placing more money a #11634
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Solution: The Course Manager for AMBA 601 wants to use a new tutorial to teach the students about business eth #11635
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(See Solution) A social historian is interested in the relationship between education (measured in years of formal #11636
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[Solution] The following data shows the written and clinical scores of 15 students who sat for a professional l #11637
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(See Solution) The concentration (in nanograms per millilieter) of plasma epinephrine were measured for 10 dogs und #11638
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Solution: Ten varieties of linseed were grown on six different plots (See attached data containing the yields #11639
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[Solution] Reanalysis of insecticide data. See background attachment and insect data attachment Instead of usi #11640
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(See Solution) When asked almost everyone will identify the mean body temperature for healthy adults as 98.6 degree #11641
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[Solved] Describe, in your own words, the following terms and give an example of each. a. point estimate b. #11642
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[Solved] The following data show samples of three chain stores in three different locations in one town and t #11643
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[Solution] Choose a variable and collect data for at least three different groups (samples). Compare the means #11644
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[Solution] Describe, in your own words, the following terms and give an example of each. Your examples are NOT #11645
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[Solution] Describe, in your own words, the following terms and give an example of each. Your examples are NOT #11646
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[Solved] In what ways is the t distribution similar to the standard normal distribution? In what ways is the #11647
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(Solved) Choose a variable. Before collecting the data, decide what a likely average might be, then complete #11648
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(Solved) Explain the difference between testing a single mean and testing the difference between two means. W #11649
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(See Solution) Explain the difference between independent samples and dependent samples. Classify the following as #11650
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Solution: Complete the following: a. Select a variable. Compare the mean of the variable for a sample of 30 f #11651
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