The owner of a local movie theater keeps track ofthe number of tickets sold in each purchase andmakes a probability distribution based on theserecords. Let X represent the number of ticketsbought in one purchase. The distribution for X isgiven in the table.Number ofTicketsProbability 0.29 0.44 0.19 0.06 0.0251234Which is the correct interpretation of the standarddeviation?O The number of tickets purchased typically variesfrom the expected value by 0.95 tickets.O If many, many purchases are made, theexpected number of tickets purchased is 2.1.O The mean number of tickets purchased typicallyvaries from the expected value by 0.95 tickets.O The mean number of tickets purchased typicallyvaries from the expected value by 0.89 tickets.

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Answered: The owner of a local movie theater…

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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answer part b only. it is not 29.665
The probability model below describes the number of repair calls that an appliance repair shop may receive during an hour. Complete parts a and b below. Repair Calls 2 3 4 Probability 0.1 0.5 0.2 0.2 a) How many calls should the shop expect per hour? The shop should expect calls per hour. (Type an integer or a decimal. Do not round.) b) What is the standard deviation? The standard deviation is. (Round to two decimal places as needed.)
Find the mean, variance and standard deviation for the probability distribution given below: X -5 2 12 10 P(X) 0.553 0.136 0.213 0.098
The random variable X is the crew size of a randomly selected shuttle mission. Its probability distribution is shown below. Complete parts a through c. 2 5 6 7 8 D 4 0.045 0.306 P(X=x) 0.025 0.187 0.431 0.006 ... a. Find and interpret the mean of the random variable. μ= 5.947 (Round to three decimal places as needed.) Interpret the mean. Select the correct choice below and fill in the answer box to complete your choice. (Round to three decimal places as needed.) A. The average number of persons in a shuttle crew is 5.947 person(s). OB. The most common number of persons in a shuttle crew is person(s). b. Obtain the standard deviation of the random variable. O (Round to three decimal places as needed.) Check answer Help me solve this View an example Get more help. 30 20 F10 F4 MacBook Air F6 DII FB Clear all DD F9
Assume that adults have IQ scores that are normally distributed with a mean of μ=105 and a standard deviation σ=15. Find the probability that a randomly selected adult has an IQ between 90 and 120. Click to view page 1 of the table. LOADING... Click to view page 2 of the table. LOADING... Question content area bottom Part 1 The probability that a randomly selected adult has an IQ between 90 and 120 is enter your response here. (Type an integer or decimal rounded to four decimal places as needed.)
In a statistics exam an individuals score is normally distributed with a mean of 80 and a sample standard deviation of 8 points. Assume there are 30 individuals in the class. Calculate the probability the class average is less than 78. 58% 8.5% 21% 91.5% 42%
Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the standard deviation is 5. What is the probability of selecting a person with a score greater than Cody’s?
Subpart A,B,C
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. 1 2 3 4 5 Р(X) 0..60 0.28 0.07 0.03 0.02 Select the correct response: 0.95 1.59 0.90 2.61
Historical data show that customers who download music from a popular Web service spend approximately $24 per month, with a standard deviation of $4. Assume the spending follows the normal probability distribution. Find the probability that a customer will spend at least $20 per month. How much (or more) do the top 7% of customers spend? What is the probability that a customer will spend at least $20 per month?
A stock can earn a return of 10%, 15%, -5%, or 0%, each with a known probability of 25%. What is the standard deviation of this stock's return? Select one: O a. .025 b. .079 c..05 d. .00625 e..0913
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