Express the confidence interval (0.432, 0.52) in the form of  ± E.

Find the Sample variance for the given sample data. Round your answer to one more decimal place than the original data.7 7 2 5 1

If z is a standard normal variable, find P( z > 0.77).

A tennis player makes a successful first serve 85% of the time. If they serve 8 times, what is the probability that she gets exactly 6 successful first serves in? Assume that each serve is independent of the others. Show your work on your paper.

Express the confidence interval (0.432, 0.52) in the form of  ± E.

The following frequency distribution depicts the scores on a math test. Find the class midpoint of scores for the interval 95-99. Scores Number of Students 75-79 2 80-84 4 85-89 6 90-94 15 95-99 5

On a test, 82% of the questions are answered correctly. If 82 questions are correct, how many questions are on the test?

Analysis of the data from 25 mothers indicates that an infant’s birth weight (g), y, can be estimated by a mother’s weight (kg), x, using the regression equation y = 29x + 1500. If a mother’s weight is 70 kg, the infant’s birth weight can be estimated as ________ g.

Express the confidence interval (0.482, 0.52) in the form of   ± E.

On a test, 75% of the questions are answered correctly. If 108 questions are correct, how many questions are on the test?