Question 1

the scores on a national achievement test are normally distributed with mean and standard deviation equal to 500 and 100 respectively

state whether the following are true or false

d)the probability that the average score for 35 students is between 550 and 560 is 0.00131

scores on a national achievement test are normally distributed with mean and standard deviation equ 00 and 100 respectively. e whether the following statements are true or false a) The proportion of students with scores exceeding 650 is 0.0668 b) The proportion of students with scores not exceeding a score of 550 is 0.6915 The proportion of students with scores greater than 550 but less than 650 is 0. 7583 d) The probability that the average score for 35 students is between 550 and 560 is 0.00131 e) If 60% of the students could not beat John's score, what was John's score? estion 2 public utility noted that the monthly electricity usage (measured in kilowatt-hours ) by certain residenti