Question: A population has a mean 30 with a standard deviation of 2.5. A sample of 50 objects was taken, and was found to have a

A population has a mean 30 with a standard deviation of 2.5. A sample of 50 objects was taken, and was found to have a mean of 29.35. At a 5% level of significance, is there evidence the mean should be decreased?

A) What type of test is this (left-tailed, right-tailed, or two-tailed)? ANSWER: L or R or 2

B) Calculate the p-value. ANSWER to 4 decimals

C) Is there enough evidence to reject the null hypothesis? ANSWER Y or N

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