The probability distribution shows the number of items a customer buys in a book store and their corresponding probabilities. Find the variance of this distribution.12345Р(X)0..600.28 0.07 0.03 0.02Select the correct response:0.951.590.902.61

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Answered: The probability distribution shows the…

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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A local library is analyzing the number of books checked out by patrons in a week. The probability distribution is given as follows: Number of Books (X) Probability (P(X)) 0 1 23 4 5 0.05 0.10 0.25 0.30 0.20 0.10 (a) What is the probability that a patron checks out more than 2 books? (b) Determine the variance in the number of books checked out.
Dorp 21 po ile The life of a light bulb is distributed normally, The Variance of the life time PS 225 and the mean life time of a bulb is 520 hours Find the probability Of a bulb lasting for at most 533 hours Round 4 decimal places
The table shows the probability distribution of the number of days (x) to complete a construction project by a contractor. x f(x) 1 0.104 2 3 0.312 4 0.240 5 0.098 6 0.017 11 If you added 2 days to each value in the Days (x) column, the variance of days to completion will be _________. a 3.428 b 2.784 c 1.428 d 1.142
Suppose that the random variable xx, shown below, represents the number of speeding tickets a person received in a three-year period. P(x)P(x) represents the probability of a randomly selected person having received that number of speeding tickets during that period. Use the probability distribution table shown below to answer the following questions. xx P(x)P(x) 0 0.287 1 0.2846 2 0.2375 3 0.0992 4 0.0471 5 0.0446 6+ 0.0000 a) What is the probability that a randomly selected person has received four tickets in a three-year period?P(x=4)=P(x=4)=b) What is the probability that a randomly selected person has received four or more tickets in a three-year period?P(x≥4)=P(x≥4)=c) What is the probability that a randomly selected person has received more than four tickets in a three-year period? P(x>4)=P(x>4)=d) Would it be unusual to randomly select a person who has received four tickets in a three-year period? Yes No e) Which probability should we use to…
P(x) 0.05 1 0.1 0.25 3 0.6 Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal places
The table below shows the probability distribution of the random variable X. a. Find the mean of the random variable. b. Obtain the standard deviation σ of the random variable. x 1 2 3 P(X=x) 0.4 0.1 0.5
In the table below x denotes the X-Tract Company’s projected annual profit (in $1,000). The table also shows the probability of earning that profit. The negative value indicates a loss. x f(x) x = profit -100 0.01 f(x) = probability -200 0.04 0 100 0.26 200 0.54 300 0.05 400 0.02 9 What is the variance of profit? a 10,187 b 10,667 c 11,170 d 11,696
We have provided a normal probability plot of data from a sample of a population. In each case, assess the normality of the variable under consideration.
g is the probability distribution of a random variable that represents the number of extracurricular activities a college freshman participates in. x 0 1 2 3 4 Px 0.06 0.13 0.45 0.23 0.13 Find the probability that a student participates in more than two activities.
Find the variance of thefollowing probability distribution. X P(X) 1 0.30 2 0.15 3 0.05 4 0.25 5 0.25 A.1.73 B.1.61 C.2.60 D.1.27
Example: Finding the Mean, Variance, and Standard Deviation The table describes the probability distribution for the number children in homeschool families in North Bay. Find the mean, variance, and standard deviation for this probability distribution. x: number of children 0 1 2 3 4 5 6 Total P(x) 0 1/11 ≈ 0.09 4/11≈ 0.36 2/11 ≈ 0.18 2/11≈ 0.18 1/11≈ 0.09 1/11 ≈ 0.09 1
The table shows the probability distribution of the number of days (x) to complete a construction project by a contractor. x f(x) 1 0.104 2 3 0.312 4 0.240 5 0.098 6 0.017 8 The variance of the days to complete the project is ________. a 1.665 b 1.542 c 1.428 d 1.322

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The probability distribution shows the number of items a customer buys in a book store and their corresponding probabilities. Find the variance of this distribution. X 1 2 3 5 P(X) 0..60 0.28 0.07 0.03 | 0.02