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 States, men spend more than women
buying gifts and cards on Valentine’s Day. Suppose a researcher
wants to test this hypothesis by randomly sampling nine men and 10
women with comparable demographic characteristics from various
large cities across the United States to be in a study. Each study
participant is asked to keep a log beginning one month before
Valentine’s Day and record all purchases made for Valentine’s Day
during that one-month period. The resulting data are shown below.
Use these data and a 1% level of significance to test to determine if,
on average, men actually do spend significantly more than women
on Valentine’s Day. Assume that such spending is normally
distributed in the population and that the population variances are
equal.
Men Women