Assume that the salaries of elementary school teachers are normally distributed with a mean $35,000 and standard deviation of $7200. If 36 teachers are selected at random, find the probability that their mean salary is lower than $32,000.

Q: Assume that women's heights are normally distrubuted with a mean of 63.6 inches and a standard…

A: From the given information, the mean is 63.6 and the standard deviation is 2.5.

Q: A study of the amount of time it takes a mechanic to rebuild the transmission for a 2005 Chevrolet…

A: A study of the amount of time it takes a mechanic to rebuild the transmission for a 2005 Chevrolet…

Q: The monthly utility bills in a city are normally​ distributed, with a mean of ​$100 and a standard…

A: We want to find given probability for given questions

Q: A newsvendor wants to achieve a 0.975 in-stock probability. Demand is normallydistributed with a…

A: Introduction: A continuous probability distribution that is symmetrical on both sides of the mean is…

Q: In a large population of college-educated adults, the mean IQ is 112 with standard deviation 25.…

A:

Q: Assume that the number of days it takes a homebuilder to complete a house is normally distributed…

A: Normal distribution is a continuous distribution which has many real-life applications. The normal…

Q: Suppose the number of students in a class for the Business Statistics program at a University has a…

A: Given Mean=23 Standard deviations=4.3 n=15

Q: In examining the invoices issued by a company, an auditor finds that the dollar amounts of invoices…

A:

Q: Assume the returns of a stock follow a normal distribution with a mean return of 18% and a standard…

A:

Q: The accountants of a known auditing firm have a mean daily salary of P850 with a standard deviation…

A: X~N(μ= 850 , σ= 82 ) μ= 850 , σ= 82 Formula for Z-score Z=(X-μ)/σ

Q: A civil engineer takes a public ride going to his firm. The average time for his trip is 24 minutes,…

A: Given Information: Population mean (u) = 24 minutes Standard Deviation (s) = 3.80 minutes Target…

Q: hotel in a European city follows a normal distribution with a mean of 170 euros and a standard…

A:

Q: Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 56…

A: The provided information is  µ=56 σ=3.3 P(X>60) a.P(X-µσ>60-563.3)=P(z>1.21)=0.1131   (from…

Q: Rivers Casino did an audit of all of their blackjack tables and found that the amount of money…

A: Provided information is, Rivers Casino did an audit of all of their blackjack tables and found that…

Q: In a study of work patterns in one population, the mean weekly family time devoted to child care is…

A:

Q: Suppose the grades in a mathematics class are Normally distributed with a mean of 75 and a standard…

A: Introduction :-  Here the grades in a mathematics class are Normally distributed with a mean of 75…

Q: Suppose 20% of all emergency room patients have broken bones. Of the next fifteen patients to…

A:

Q: A set of final examination grades in an introductory statistics course is normally​ distributed,…

A: Let "X" be the final examination grades in an introductory statistics course. Find z-value: Note…

Q: A Nielsen Company report states that the mean number of TV sets in a U.S. household is 2.24. Assume…

A: Solution: Given information: n= 85 Sample size  μ= 2.24 Population mean σ=1.2 Population standard…

Q: Of all the companies on the New York Stock Exchange, profits are normally distributed with a mean of…

A: Given data: Mean = $6.54 million Standard deviation = $10.45 million Sample size  = 73 To find: what…

Q: The battery life of a fully charged cell phone is normally distributed, with a mean of 14 hours and…

A:

Q: Suppose the average speeds of passenger trains traveling from Newark, New Jersey, to Philadelphia,…

A: Solution: a. Let X-bar be the average speed of passenger. From the given information, X-bar follows…

Q: (a) A 120-watt fluorescent light has an average brightness of 1986 lumens, with a standard deviation…

A: Given : μ=1986 σ=94

Q: Assume that the heights of adult puffins are normally distributed, with a mean of μ=μ= 15.9 inches…

A: Obtain the probability of obtaining a sample mean height less than 14.8 inches. The probability of…

Q: 1. Assume that the amounts of weights that male college students gain during their freshman year are…

A:

Q: In a study of work patterns, data from 669 subjects were collected. For the time spent in child…

A: We have given that,  Let X be the random variable from normal distribution with mean (μ) = 23.08,…

Q: Assume that the salaries of elementary school teachers in the United States are normally distributed…

A: Given: μ=32000, σ=3000, n=100 The corresponding z-value needed to be computed is:

Q: Assume that the traffic to the web site of Smiley's People, Inc., which sells customized T-shirts,…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

Q: Suppose that the annual household income in a small Midwestern community is normally distributed…

A: Given : X ~ Nμ, σ mean, μ = $55000 S.D, σ = 4500 a. P(household will have an income between $50000…

Q: The monthly utility bills in a city are normally​ distributed, with a mean of ​$100 and a standard…

A:

Q: Assume the average height for all American women is 64 inches with a standard deviation of 2 inches.…

A:

Q: The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard…

A: Here, mean is $100 and standard deviation is $14.

Q: Suppose that the mean and standard deviation of plants height are 130 and 42, respectively, if a…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 130, standard…

Q: 2) Assume that men’s weight in the United States are normally distributed with a mean 172 pounds and…

A: Given,   Mean = 172 Standard deviation = 29

Q: A civil engineer takes a public ride going to his firm. The average time for his trip is 24 minutes,…

A: The mean is μ=24 and the standard deviation σ=3.8 The office coffee time is 8:50 to 9:00 AM. So he…

Q: The average resident of Metro City produces 770 pounds of solid waste each year, and the standard…

A: We have to find probability

Q: What is the standard deviation of this probability distribution

A:

Q: The average person uses 130 gallons of water daily. If the standard deviation is 35 gallons , find…

A: Given that, Mean = 130 Standard deviation = 35 Sample size = 25

Q: Suppose the temperature during the month of June is normally distributed with mean 68 degrees…

A: Answer: - Suppose the temperature during the month of June is normally distributed with…

Q: Given the population of men has normally distributed weights with a mean of 172 lb and a standard…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: Suppose that the number of gallons of milk sold per day at a local supermarket are normally…

A: Let X denote the number of gallons of milk sold per day. X ~ N(424.7,460.9609)

Q: Given a sample with a mean of 151 and a standard deviation of 27, find the probability that a…

A: Given :  sample with mean of 151 and standard deviation of 27 we have to find P(X > 158 )

Q: The monthly utility bills in a city are normally​ distributed, with a mean of ​$100 and a standard…

A: It is given that the mean is 100 and the standard deviation is 15.

Q: ppose the average age of family members is 34 with a standard deviation of 4. If 100 members of the…

A: Given, μ=34σ=4 n=100

Q: Given the population of men has normally distributed weights with a mean of 172 lb and a standard…

A: Let X denote the population of men has normally distributed weights with a mean of 172 lb and a…

Q: a) No more than two of them dislike their mother in law? c) What is the expected number of women ()…

A:

Q: Suppose 150 people take a quiz, and say the mean score was a 100 out of 200 points, with a standard…

A: Given data:     The given mean score is: μ=100. The standard deviation is: σ=40. The number of…

Q: Solve the problem. Assume that male Siberian huskies' weights are normally distributed with a mean…

A:

Q: Use your Ti-84 to find the mean and standard deviation of the discrete probability distribution…

A: We find the mean and standard deviation using the step by step procedure in Ti-84 calculator as…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.