Statitics and Probabilities (b)The average weight of 600 students who were taking IQ test was38.20 kg with a standard deviation of 15.32 kg. Let i be theaverage weight for a random sample of certain students selectedfrom this school. Find the mean and standard deviation of x for asample size of:i.7.i.480.

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Answered: (b) The average weight of 600 students…

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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Although the rules of probability are just basic facts about percents or proportions, we need to be able to use the language of events and their probabilities. Choose an American adult aged 2020 years and over at random. Define two events: ?=A= the person chosen is obese ?=B= the person chosen is overweight, but not obese According to the National Center for Health Statistics, ?(?)=0.38P(A)=0.38 and ?(?)=0.33P(B)=0.33 . (a) Select the correct explanation describing why events ?A and ?B are disjoint. Event ?B rules out obese subjects. Some people may be considered obese and overweight. Some people are not obese nor overweight. An obese person is certainly overweight. (b) Select the correct description stating what the event ?A or ?B is. ?A or ?B is the event that the person chosen is not obese or not overweight. ?A or ?B is the event that the person chosen is overweight and obese. ?A or ?B is the event that the person chosen is overweight or obese or both. ?A or…
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(b) The average weight of 600 students who were taking IQ test was 38.20 kg with a standard deviation of 15.32 kg. Let x be the average weight for a random sample of certain students selected from this school. Find the mean and standard deviation of for a sample size of: i. 7. i. 480.