Unformatted text preview: 30. Find the test statistic for testing these hypotheses.
a. 0.818 31.
‘ testing that the salary is higher among the state school graduates. b. 0.848
e. 2.545 Use the following information to answer the next 2 questions (31-32): A CEO says that he prefers his company to hire graduates from state schools rather than
private schools. He claims that state school graduates are a better ﬁt for his company, and
hence more productive. To back up his claim, he shows you data on 38 new hires from the
last 20 years, and their salaries after 10 years. Higher productivity implies higher salary
(hopefully!) so you test to see Whether or not the salary of the state school graduates
(population 1) is higher than that of private schOol graduates (population 2). The data are
summarized below (dollar values in $1000s); Group Sample Size Average Salary Standard Deviation
State School 23 $79 $27
Private School 15 $72 $17 Assume that the variance in the two groups is not equal and compute the test statistic for a. 0.041 »
e. 0137 12
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- Spring '08