Two separate samples receive two different treatments. The first treatment group (N = 15) has a mean of 50 with SS = 210. The second treatment group (N = 9) has a mean of 56 with SS = 190. Does the second treatment result in larger scores than the first treatment? (1) explicitly define your null hypothesis H0 and alternative hypothesis H1; (2) calculate and report the observed t- score;

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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.