Suppose that the amount of time that students spend studying in the library in one sitting is normally distributed with mean 41 minutes and standard deviation 19 minutes. A researcher observed 7 students who entered the library to study. Round all answers to 4 decimal places where possible.

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Suppose that the amount of time that students spend studying in the library in one sitting is normally distributed with
mean 41 minutes and standard deviation 19 minutes. A researcher observed 7 students who entered the library to study.
Round all answers to 4 decimal places where possible.
Transcribed Image Text:Suppose that the amount of time that students spend studying in the library in one sitting is normally distributed with mean 41 minutes and standard deviation 19 minutes. A researcher observed 7 students who entered the library to study. Round all answers to 4 decimal places where possible.
e. For the 7 students, find the probability that their average time studying is between 45 and 50 minutes.
f. Find the probability that the randomly selected 7 students will have a total study time less than 301 minutes.
g. For part e) and f), is the assumption of normal necessary? ONoOYes
h. The top 10% of the total study time for groups of 7 students will be given a sticker that says "Great dedication".
What is the least total time that a group can study and still receive a sticker?
minutes
Transcribed Image Text:e. For the 7 students, find the probability that their average time studying is between 45 and 50 minutes. f. Find the probability that the randomly selected 7 students will have a total study time less than 301 minutes. g. For part e) and f), is the assumption of normal necessary? ONoOYes h. The top 10% of the total study time for groups of 7 students will be given a sticker that says "Great dedication". What is the least total time that a group can study and still receive a sticker? minutes
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