In order to receive partial credit for a problem, and certainly full credit, your work must be neat an
In order to receive partial credit for a problem, and certainly full credit,
your work must be neat an
d
legible.
It is recommended that you use this document and enter your answers directly here. Submit this document to the appropriate Dropbox when you are finished,
but before the allotted time expires.
-
The SAT scores for 900 female and 800 male college freshman are classified as low, medium, or high:
Range Men Women High 190 250 Medium 430 520 Low 180 130
Use this data to develop a Relative Frequency Table (for Men and Women) and then draw and properly label a Comparative Bar Chart (Next Page) showing the direct comparison of the relative frequencies in each of the three classifications by sex.
The table below is provided for your convenience. It is not meant to imply that you need the number of rows or columns filled. You may also erase this table and submit your own. - Use the data above to draw and label a Pie Chart for the Women in terms of Relative Frequency.
- Using your software of choice, generate a list 20 random numbers in the range of 1 through 5. Then plot these numbers as a histogram. Paste the list and Histrogram, properly labeled, below.
-
A survey on cola type soft drinks vs. non-cola was report in 1999 with the following quality ratings of 0 to 100.
Cola 56 44 62 36 39 53 50 65 45 40 56 68 41 30 40 50 56 30 22
Non-cola 62 53 75 42 47 40 34 62 52 50 34 42 36 75 80 47 56 62
Construct two stem-and-leaf displays, and discuss similarities and differences for the two types of soft drinks. - Recently I was shopping for a car and accumulated the data below.
| Price | Mileage |
| $20,000 | 19000 |
| $25,000 | 17000 |
| $18,000 | 20000 |
| $40,000 | 13500 |
| $31,000 | 14900 |
- Assuming that all the vehicles were comparably equipped and the same year, is the mileage a good predictor of price. In order to receive credit, you must prove you decision using the analysis methods learned in class. A mere answer of yes or no will not receive credit.
- After accumulating the above information, I received a quote of $16,995 for a car with 22,000 miles. Is this a good buy? Again, in order to receive credit, you must prove you decision using the analysis methods learned in class. A mere answer of yes or no will not receive credit.
.
6. A sample consisting of four pieces of luggage was selected from among those checked at an airline counter yielding the following data on x = weight in pounds:
x 1 = 73.7 x 2 = 60.6 x 3 = 80.7 x 4 = 67.1
Suppose that one more piece is selected: denote its weight by x
5
. Find a value of x
5
such that
\[\overline{x}\]
= sample median.
7. Astronomers are interested in understanding the recessional velocity of galaxies – that is, the speed at which they are moving away from us. The accompanying table contains the recessional velocities for a sample of galaxies, measured in km/sec. Negative velocity indicates the galaxy is moving towards us.
-
Calculate these numerical summaries:
The mean __________
The standard deviation ___________
The median _________
The interquartile range ______________Recessional
velocities
(km/sec)170 150 290 500 -130 920 -70 500 -220 960 200 500 290 850 200 800 300 1090 650 - Construct and properly label a box plot for these data. Also indicate the key features (Five Number Summary) that are present in your box plot. (Hint – you can use the MS Word Draw function to do this.
Deliverable: Word Document
