MGSC 301 Statistics for
Business and
Economics Quiz 1 with
Verified Solutions
Athabasca University
, Problem 1
Use the information below to answer questions 1 to 5.
A sociologist interested in youth culture is conducting a study on students’ usage of
Twitter. To determine how many times students log in to their accounts, she obtains
a sample of 10 students. Students are asked how many times they log in to their
account per month. The responses are shown below.
2. The 80th percentile is
Select one:
a. 310.
b. 85.
c. 290.
d. 185.
e. 240.
3. Which of the following measures would, by definition, have a z-score of zero?
Select one:
a. the median
b. the interquartile range
c. the mean
d. the third quartile
e. the mode
4. Calculating the z-scores for the data above indicates
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