On a popular app, users rate hair salons as 1, 2, 3, 4, or 5 stars. Suppose a rating is randomly selected from all the ratings on the app. Let X be the number ofstars of the selected rating. Here is the probability distribution of X.Value x of X12 345P(X=x)0.260.180.090.220.25For parts (a) and (b) below, find the probability that the randomly selected hair salon rating has the described number of stars.(a) More than 3: ||(b) Fewer than 3: ||

Answered: Image /qna-images/answer/4d18f954-e16b-418c-b6a3-3893132bc53d.jpg

Answered: On a popular app, users rate hair…

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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For families with 5 children, let X be the number of children with Genetic Condition B. Can the following table be a probability distribution for the random variable X?
Jump to... Suppose random variable X follows a Chi-square distribution with 7 degrees of freedom and random variable Y follows a Chi-square distribution with 17 degrees of freedom. Which one of the following statements is true? Select one: a. P( Y 0 ) b. The probability distribution curve of X is more symmetric than that of Y. C. Y is symmetric around it's mean. d. Seventeen (17) percent of the y-values are greater than 0. e. The percentage of y-values that are greater 17 is larger than the percentage of x-values that are greater than 17. Prevlous page Next page Raturn to: ASSESSMENTS
Q1. Let X be the number of major storms in a particular state in a given year. The probability of having no major storms is 0.50, of one major storm is 0.30, of two major storms is 0.10, of three major storms is 0.08, and of four major storms is 0.02 (there have never been more than 4 major storms in this state in a given year). (a) Write down the probability distribution of X in table form, and also check to make sure it is a valid probability distribution and find the expected number of major storms in a given year, and the standard deviation of the number of storms in a given year. (b) Find the probability that there is at least 1 storm in a given year. (c) If there was more than 1 storm, find the probability that there were 3 storms.
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On a popular app, users rate hair salons as 1, 2, 3, 4, or 5 stars. Suppose a rating is randomly selected from all the ratings on the app. Let X be the number of stars of the selected rating. Here is the probability distribution of X. Value x of X 1 2 3 4 5 P(X=x) 0.25 0.19 0.09 0.21 0.26 For parts (a) and (b) below, find the probability that the randomly selected hair salon rating has the described number of stars. (a) More than 3: || (b) At most 2:
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