This assignment needs other attachment-"data for practice problems"

1. Access the University of Phoenix Material, "Data for Inferential Practice Problems." Use the Excel ^® Analysis ToolPak™ when necessary for the following:

• a.       Determine the types of measurement scales for each variable (Nominal, Ordinal, Interval, Ratio):
• Name
• Gender
• Absences
• Physical Education (PE)
• Math
• Writing
• Reading
  (b) Determine the number of boys and girls in the class and create a bar graph or pie chart to display the information.
  (c) Determine the correlations between pairs of all interval variables (i.e., Absences with PE, PE with math, math with writing, etc.)
  (d) How much of the math grade can be explained by the PE grade? How much of the writing grade can be explained by the reading grade? Show work for correlation of these variables.
  Determine the types of measurement scales for each variable (Nominal, Ordinal, Interval, or Ratio):
  1. Name - Nominal Variable
  2. Gender - Nominal Variable
  3. Absences - Ratio Variable
  4. PE – Interval variable
  5. Math - Interval Variable
  6. Writing - Ordinal Variable
  7. Reading grade - Interval
     Here is the information I used to determine each of the above:
     b.       Determine the number of boys and girls in the class and create a bar graph or pie chart to display the information.
     Problem #2
• Please complete the following using the 5 steps of hypothesis testing for a t-test below. I have included the numbers necessary below which you need to place into the t-test formula.
• Let’s use the following example: Is there a difference between those having a study group for a test and those who do not have study sessions?

Step 1: Determine the null (no difference between groups) and research/alternate hypothesis. Ha and Ho

Step 2. Find the mean, variance, and number of people in each group. Group A= Study Session Group B= No Study Session (They are provided below)

A= 24- mean, 28.5- variance, 5- number of participants

B= 18- mean, 7- variance, 5- number of participants

Complete a one directional t-test to find the t-value.

Step 3. Consult the appendix for the degrees of freedom. Since there are 2 groups we subtract the total number of participants 10-2 to get a df of 8.

Look at our appendix to find at .05 level of significance what the degrees of freedom for 8 would be.

Step 4 Compare the t value to the critical value

Step 5 Reject or accept the t-value based on step 4 and explain what you found.

Problem #3-This problem uses same attachment of "data for practice problems-problem 3"

    Access the University of Phoenix Material, "Data for Inferential Practice Problems." Continue using the information from Inferential Practice Problems Part I and determine the following using the Excel ^® Analysis ToolPak™ when necessary:

         Calculate all measures of central tendency for data that are interval or ratio in measurement

    Calculate the standard deviation for data that are interval or ratio in measurement

    Assume this is a sample of students, calculate a t-test that compares boys and girls on the number of absences (you can assume equal variances).  Is there a significant difference in absences between gender?

    Assume this is a sample of students and that students receive an A grade if their score is 90 or above. Calculate a chi-square test to determine whether girls achieve more A grades than boys in math. Calculate a chi-square test to determine whether girls achieve more A grades than boys in reading

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