A random sample of size 15 is selected from a normal population. The population standard deviation is unknown. Assume the null hypothesis indicates a two-tailed test and the researcher decided to use the 0.10 significance level. For what values of t will the null hypothesis not be rejected? A. To the left of - 1.645 or to the right of 1.645B. To the left of - 1.345 or to the right of 1.345C. To the left of - 1.282 or to the right of 1.282D. Between - 1.761 and 1.761

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Mathematics

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22 May, 10:03

A random sample of size 15 is selected from a normal population. The population standard deviation is unknown. Assume the null hypothesis indicates a two-tailed test and the researcher decided to use the 0.10 significance level. For what values of t will the null hypothesis not be rejected? A. To the left of - 1.645 or to the right of 1.645B. To the left of - 1.345 or to the right of 1.345C. To the left of - 1.282 or to the right of 1.282D. Between - 1.761 and 1.761

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Eleanor Martinez · Answer 1

D. Between - 1.761 and 1.761

Step-by-step explanation:

T-table need to be used for the values of t to reject or not to reject the null hypothesis.

Since the sample size is 15, degrees of freedom is 15-1=14

Two tailed t-value at 0.10 significance level and 14 degrees of freedom is 1.761.

Therefore we fail to reject the null hypothesis for t-values between - 1.761 and 1.761, since these values does not fall in the critical region.