Question

UIT WIuld mean of 3.05 and a standard deviation of 0.30. Find the probability that the mean GPA of a random sample of 49 students selected from this university is 2.75 or lower, Round your answer to four decimal places Attach File Browse My Computer Browse Content Collection Browse Dropbox QUESTION 6 The times that college students spend studying per week have a distribution skewed to the right with a mean of 8.6 hours and a standard deviation of 2.8 hours. Find the probability that the mean time spent studying per week for a random sample of 16 college students would be more than 9.1 hours. Round your answer to two decimal places Attach File Browse My Computer Browse Content Collection Browse Dropbox Click Save and Submit to save and submit. Click Save All Atto se all stars, 30 MacBook Air # 3 % 5 2 4 7 3 E 20 Q

Answer 1

3d Let x be random variable college denotes The time that per week. students spend studying Mear, p = 8.6 standard deviation, o = 2.8 Sample size, n=16 My = M = 8.6 x= 2-8 0.7 516 Here, we need to find P( x 9.1) P(Z > 9.1) - P(x-P 2 x 12 ) Plz> 0.7143) 1- P(ZLO.7143) -1- 0,76 2479 (from Standard Normal table = 0.237521 0,24