If a treatment is expected to decrease scores on a variable for which the mean is expected to be µ = 50, what is the null hypothesis?   a. µwith treatment > 50   b. µwith treatment > 50   c. µwith treatment < 50   d. µwith treatment < 50

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.