Question: given a ssample size of 18, with sample mean of 660.3 and sample st. dev. 95.9 we are to perform the following hypothesis testing

null hypo. H0: mu = 700
alternative hypo. H1: mu not equal 700

at a 0.05 significance level what is the critical value in this test? Do we reject the null hypothesis?

+ 2.11 no, not enough evidence to reject the null hyp.

-2.11 yes, enough evidence

+ 1.96 no, not enough evidence

- 1.65 yes enough evidence

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