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What the value of the test statistic for testing

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Reference no: EM132894137

Problem 1: An SRS of 100 laborers who use the services of a national temporary employment agency were asked the number of days they worked in the past year. Five years ago, the population mean was 120 days and we want to test if these data provide evidence that μ has decreased from the value of 120 days of five years ago. If x-bar = 107 days and s = 45 days, the value of the test statistic for testing:
Ho: μ = 120 vs. Ha: μ < 120 is:

a. - 2.67
b. - 3.41
c. - 2.56
d. - 2.89
e. - 2.38

Reference no: EM132894137

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