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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 48 minutes and standard deviation 18 minutes. A researcher observed 41 students who entered the library to study. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N 48 b. What is the distribution of ? - N 48 c. What is the distribution of ? - N X- 18 d. If one randomly selected student is timed, find the probability that this student's time will be between 46 and 49 minutes. e. For the 41 students, find the probability that their average time studying is between 46 and 49 minutes. f. Find the probability that the randomly selected 41 students will have a total study time more than 1804 minutes. g. For part e) and f), is the assumption of normal necessary? O No Yes h. The top 15% of the total study time for groups of 41 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 Submit Question

Suppose that the amount of time that students spend studying in the library in one sitting is normally distributed with mean 48 minutes and standard deviation 18 minutes. A researcher observed 41 students who entered the library to study. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N 48 b. What is the distribution of ? - N 48 c. What is the distribution of ? - N X- 18 d. If one randomly selected student is timed, find the probability that this student's time will be between 46 and 49 minutes. e. For the 41 students, find the probability that their average time studying is between 46 and 49 minutes. f. Find the probability that the randomly selected 41 students will have a total study time more than 1804 minutes. g. For part e) and f), is the assumption of normal necessary? O No Yes h. The top 15% of the total study time for groups of 41 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 Submit Question

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question 8 < > Suppose that the amount of time that students spend studying in the library in one sitting is normally distributed with mean 48 minutes and standard deviation 18 minutes. A researcher observed 41 students who entered the library to study. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N( 48 b. What is the distribution of ? - N( 48 c. What is the distribution of a? - N d. If one randomly selected student is timed, find the probability that this student's time will be between 46 and 49 minutes. 18 e. For the 41 students, find the probability that their average time studying is between 46 and 49 minutes. Submit Question f. Find the probability that the randomly selected 41 students will have a total study time more than 1804 minutes. g. For part e) and f), is the assumption of normal necessary? O No Yes h. The top 15% of the total study time for groups of 41 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:Question 8 < > Suppose that the amount of time that students spend studying in the library in one sitting is normally distributed with mean 48 minutes and standard deviation 18 minutes. A researcher observed 41 students who entered the library to study. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N( 48 b. What is the distribution of ? - N( 48 c. What is the distribution of a? - N d. If one randomly selected student is timed, find the probability that this student's time will be between 46 and 49 minutes. 18 e. For the 41 students, find the probability that their average time studying is between 46 and 49 minutes. Submit Question f. Find the probability that the randomly selected 41 students will have a total study time more than 1804 minutes. g. For part e) and f), is the assumption of normal necessary? O No Yes h. The top 15% of the total study time for groups of 41 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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