(a) What test should be used? (b) Calculate: p-value = , and d.f. = (c) At 5% significance level, your decision is: (d) Is there sufficient evidence to conclude that the mean salary of younger employees is less than the mean salary of older employees at this company?
19)
A Human Resources director was interested in comparing the salaries of younger (age 22-30) and older (age 31-40) employees at her company. A random samples of 8 younger employees and 9 older employees yielded the following hourly salaries (in $).
Younger 35 25 28 37 23 18 41 32
Older 22 29 40 24 36 34 33 28 31
At the 5% significance level, do the data provide sufficient evidence to conclude that the
(a) What test should be used?
(b) Calculate: p-value = , and d.f. =
(c) At 5% significance level, your decision is:
(d) Is there sufficient evidence to conclude that the mean salary of younger employees is less than the mean salary of older employees at this company?
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