GB 513 Course Great Wisdom / tutorialrank.com GB 513 Course Great Wisdom / tutorialrank.com | Page 7

randomly calling gasoline stations. Your random survey of 25
stations produces the following prices (all in $). Assume
gasoline prices for a region are normally distributed. Do the
data you obtained provide enough evidence to reject the
claim? Use a 1% level of significance.
3.27 3.29 3.20 3.23 3.16 3.07 3.15 3.23 3.21 3.14
Question 3
3.16 3.20 3.37 3.19 3.20 3.24 3.27 3.09 3.35 3.14 3.05 3.35
3.14 3.07 3.10
Where do CFOs get their money news? According to Robert
Half International, 47% get their money news from
newspapers, 15% get it from communication/colleagues, 12%
get it from television, 11% from the Internet, 9% from
magazines, 5% from radio, and 1% do not know. Suppose a
researcher wants to test these results. She randomly samples
67 CFOs and finds that 40 of them get their money news
from newspapers. Does the test show enough evidence to
reject the findings of Robert Half International? Use a = .05.
Question 4
To answer this question, use the Data Analysis Toolpack in
Excel and select “t-Test: Two-Sample Assuming Equal
Variances” from the list of available tools. Explain your
answer (how did you decide if men spend more) and include
the output table. Some studies have shown that in the United