A study shows in a certain school that the average number of hours a student answers his/her module in a day is 26.8 hours with a standard deviation of 5.57. Assuming that the data are normally distributed, a) What is the number of hours in answering modules of a certain student with a z-score of 1.47? b) Find the probability that the number of hours spent by a student in answering his/her modules is greater than 28 hours. c) Find the probability that the number of hours spent by a student in answering his/her modules is less than 42 hours.
A study shows in a certain school that the average number of hours a student answers his/her module in a day is 26.8 hours with a standard deviation of 5.57. Assuming that the data are
a) What is the number of hours in answering modules of a certain student with a z-score of 1.47?
b) Find the probability that the number of hours spent by a student in answering his/her modules is greater than 28 hours.
c) Find the probability that the number of hours spent by a student in answering his/her modules is less than 42 hours.
d) Find the probability that the number of hours spent by a student in answering his/her modules is between 19 hours and 28 hours.
e) If there were 2,780 students in that school, how many students spent between 15 and 41 hours in answering his/her modules.
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