# MS 150 Statistics spring 2010 test one: Will you be(bo) my friend? • Name:

Bebo
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The data is the number of friends reported by Bebo users.

1. __________ What is the level of measurement for the data?
2. __________ Find the sample size n.
3. __________ Find the minimum.
4. __________ Find the maximum.
5. __________ Find the range.
6. __________ Find the midrange.
7. __________ Find the mode.
8. __________ Find the median.
9. __________ Find the sample mean x.
10. __________ Find the sample standard deviation sx.
11. __________ Find the sample coefficient of variation CV.
12. __________ If this data is to be divided into six classes, what is the width of a single class?
13. Determine the frequency and calculate the relative frequency using six classes. Record your results in the table provided.
Bin upper limitsFrequency FRelative Frequency
Sums:
1. Sketch a relative frequency histogram of the data, labeling your horizontal axis and vertical axis as appropriate. Use the back if you prefer.
2. ______________________________ What is the shape of the histogram?
3. z = __________ The largest number of friends for a FaceBook user is 402 friends. Calculate a z-score for 402 friends using the mean number of Bebo friends and the standard deviation for the number of Bebo friends calculated above.
4. _________________ Would 402 friends be an ordinary value OR an extraordinary value for a Bebo user?