need help on this section. need a clear explanation. thank you

A random sample of n = 7 individuals is selected from a population with u = 50, and a treatment is administered to each individual in the sample. After treatment, the following scores are observed: 37 49 47 47 47 43 45 & Distribution Degrees of Freedom - 5 -1780 $220 o -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 -1.00 Compute the sample mean and variance. M Use the Distributions tool to help answer the questions that follow. How much difference is there between the mean for the treated sample and the mean for the original population? (Note: In a hypothesis test, this value forms the numerator of the : statistic.) If there is no treatment effect, what is the typical difference between the sample mean and its population mean? That is, find the standard error for M. (Note: In a hypothesis test, this value is the denominator of the r statistic.) Based on the sample data, does the treatment have a significant effect? Use a two-tailed test with a = .05. (Show three decimal places.) t-critical The results indicate: O Failure to reject the null hypothesis; there is a significant treatment effect. O Rejection of the null hypothesis; there is not a significant treatment effect. O Rejection of the null hypothesis; there is a significant treatment effect. O Failure to reject the null hypothesis; there is not a significant treatment effect. Does the treatment have a significant effect? Use a two-tailed test with a = .01. (Show three decimal places.) t-critical The results indicate: O Failure to reject the null hypothesis; there is not a significant treatment effect. O Failure to reject the null hypothesis; there is a significant treatment effect. O Rejection of the null hypothesis; there is not a significant treatment effect. O Rejection of the null hypothesis; there is a significant treatment effect