A researcher conducts a well-designed study to compare a sample mean to a known
ID: 3127957 • Letter: A
Question
A researcher conducts a well-designed study to compare a sample mean to a known population mean and uses alpha=.05, one-tailed. She finds a z-test of -1.82. What should she conclude?
Data support the alternative hypothesis
The conclusion cannot be made without knowing the direction of the alternative hypothesis
The 95% confidence interval of z will contain zero
She fails to reject the null hypothesis
a.Data support the alternative hypothesis
b.The conclusion cannot be made without knowing the direction of the alternative hypothesis
c.The 95% confidence interval of z will contain zero
d.She fails to reject the null hypothesis
Explanation / Answer
a. Data support the alternative hypothesis
since p value for z=-1.82 is 0.034 so p<alpha reject null hypothesis
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