Based on a survey, it is known that CS students spend an average of 3 hours accessing social media a day with a standard deviation of 1.2 hours. a. What is the probability that one CS student spends more than 310 hours in 100 days accessing social media? b. As many as 49 CS students are selected at random, what is the probability that we will get an average length of accessing social media per day between 2.6 hours and 3.2 hours?

Based on a survey, it is known that CS students spend an average of 3 hours accessing social media a day with a standard deviation of 1.2 hours. a. What is the probability that one CS student spends more than 310 hours in 100 days accessing social media? b. As many as 49 CS students are selected at random, what is the probability that we will get an average length of accessing social media per day between 2.6 hours and 3.2 hours?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question

Based on a survey, it is known that CS students spend an average of 3 hours accessing social media a day with a standard deviation of 1.2 hours.
a. What is the probability that one CS student spends more than 310 hours in 100 days accessing social media?
b. As many as 49 CS students are selected at random, what is the probability that we will get an average length of accessing social media per day between 2.6 hours and 3.2 hours?

Expert Solution