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A bank tests the null hypothesis that the mean age of the bank’s mortgage holders is less than or equal to 45 years, versus an alternative that the mean age is greater than 45 years. They take a sample and calculate a p-value of 0.0202. The null hypothesis would be rejected at a significance level of α= 0.05. Please answer with calculation and explanation

Because different sales trainees are assigned to the two experimental groups, it is reasonable to believe that the two samples are independent. Assuming that the normality assumption holds, and using the equal variances procedure, test the hypotheses you set up in part a at level of significance .10, .05, .01 and .001. How much evidence is there that type A training produces results that are superior to those of type B? (Round your answer to 3 decimal places.)

Two students randomly selected from a statistics class, and it is observed whether or not they suffer from math anxiety. Indicate which is simple and which is compound. A. Both students suffer from math anxiety. B. Exactly one student suffers from math anxiety. C. The first student does not suffer and the second suffers from math anxiety. D. None of the students suffer from math anxiety.

Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the night shift than on the day shift. Assume the population standard deviation for the number of units produced on the day shift is 21 and is 28 on the night shift. A sample of 54 day-shift workers showed that the mean number of units produced was 345. A sample of 60 night-shift workers showed that the mean number of units produced was 351. At the .05 significance level, is the number of units produced on the night shift […]

Under what circumstances should at distribution be used rather than the normal distribution to look up areas or probabilities associated with distances from the mean? To complete questions 9 and 10, use the bpstudy.sav file. Select three variables from the dataset bpstudy.sav. Two of the variables should be good candidates for a correlation, and the other variable should be a poor candidate for a correlation. Good candidates are variables that meet the assumptions (such as normally distributed, reliably measured, interval-ratio level of measurement). Poor candidates are variables that do not meet assumptions or that have clear problems (such as restricted range, extreme outliers, […]