PLEASE HELP ME ASAP In the following studies (a and b) a single sample mean is being compared to a population with a known mean but an unknown variance. Determine what test to conduct for study a and for study b. Decide whether there is a significant difference between means. (If the df is not given in the table, use the t for the closest highest df value). Go through each step of the hypothesis testing procedure. Be sure to show all of your computations.

See the attached graph...

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