A Harris poll claims that each person in the US will spend an average of $92.12 on Halloween this year.Assume that spending is approximately normal with a standard deviation of $10.05.al What is the probability that someone will spend more than $100 on Halloween this year?b) How much would someone have to spend to be in the top 15% of Halloween spending?EditViewInsert Format ToolsTable12pt vParagraph vBIUO words</>

Given : A Harris poll claims that each person in the US will spend an average of $92.12 on…

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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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The probabilities that a person is receiving a chat message 0, 1, 2, 3, 4, or 5 per day are the following: 0.08, 0.19, 0.36, 0.25, 0.07, and 0.05. Find the mean, variance, and standard deviation and interpret the results.
According to the Centers of Disease Control and Prevention (CDC), the aging of the U.S. population is translating into many more visits to doctors’ offices and hospitals. It is estimated that an average person makes four visits a year to doctors’ offices and hospitals. a. What are the mean and the standard deviation of an average person’s number of monthly visits to doctors’ offices and hospitals? (Round your answers to 4 decimal places.) b. What is the probability that an average person does not make any monthly visits to doctors’ offices and hospitals? (Do not round intermediate calculations. Round your final answer to 4 decimal places.) c. What is the probability that an average person makes at least one monthly visit to doctors’ offices and hospitals? (Do not round intermediate calculations. Round your final answer to 4 decimal places.)
Billiard tables have mean degree of balance 0 and standard deviation 1. What is the probability that the degree is 0.01.
the average sales price of a single-family house in the U.S. is $235,500. you randomly select 12 single family houses. what is the probability that the mean sales price is more than $225,000? assume that the prices are normally distrubuted with a standard deviation of $50,000.
In a survey, 80% of the voters support a particular referendum. If 30 voters are chosen, find the standard deviation of the number of voters who support the referendum.
Consider an experiment in which a coin is tossed thrice. Let X be the number of heads. Find the mean, variance and standard deviation.
The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.3 days and standard deviation of 1.1 days. Use your graphing calculator to answer the following questions. Write your answers in percent form. Round your answers to the nearest tenth of a percent.a) What is the probability of spending less than 8 days in recovery? %b) What is the probability of spending more than 5 days in recovery? %c) What is the probability of spending between 5 days and 8 days in recovery? %
60% of all the students passed an exam. If a random sample of 10 students is selected, What is the mean and the standard deviation ?
In the 1992 presidential election, Alaska's 40 election districts averaged 2008 votes per district for President Clinton. The standard deviation was 573. (There are only 40 election districts in Alaska.) The distribution of the votes per district for President Clinton was bell-shaped. Let X = number of votes for President Clinton for an election district. (Source: The World Almanac and Book of Facts) Round all answers except part e. to 4 decimal places.a. Find the probability that a randomly selected district had fewer than 2096 votes for President Clinton. b. Find the probability that a randomly selected district had between 2047 and 2177 votes for President Clinton.c. Find the third quartile for votes for President Clinton. Round your answer to the nearest whole number.
Evpte. If the probability of a defective bolt is 0.1, find Ta) the mean (b) the standard deviation for the distribution of defective bolts in a total of 400.
The Greenville Power Authority states that the mean monthly energy bill for their customers is $228 with a standard deviation of $38. They know that energy bills follow a normal distribution. a. Between what two values do we expect 99.7% of energy bill’s to fall? b. What is the probability of a randomly selected energy bill at least $190?
a. The mean of this distribution is b. The standard deviation is c. The probability that the the child will be older than 5 years old?

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