7. A random sample of 22 employees in company A has a mean annual income of OMR 10000 and a standard deviation of OMR 1700. In company B, a random sample of 25 employees has a mean annual income of OMR 9500 and a standard deviation of OMR 1500 Test the claim at a = 0.05 that the mean annual incomes in the two companies are different. Assume the population variances are equal. Therefore, the level of significance is:
7. A random sample of 22 employees in company A has a mean annual income of OMR 10000 and a standard deviation of OMR 1700. In company B, a random sample of 25 employees has a mean annual income of OMR 9500 and a standard deviation of OMR 1500 Test the claim at a = 0.05 that the mean annual incomes in the two companies are different. Assume the population variances are equal. Therefore, the level of significance is:
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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7. A random sample of 22 employees in company A has a mean annual income of OMR 10000 and a standard deviation of OMR 1700. In company B, a random sample of 25 employees has a mean annual income of OMR 9500 and a standard deviation of OMR 1500 Test the claim at a = 0.05 that the mean annual incomes in the two companies are different. Assume the population variances are equal.
Therefore, the level of significance is:
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