The average time a person spends shopping in a grocery store is 43 minutes. If the time is normally distributed with a standard deviation of 8 minutes, find the probability that the mean time for a sample of 20 shoppers will be between 42 and 45 minutes. O 0.954 O 0.712 0.581 0.869

Q: Find the probability that the sample mean is between 40 and 50. Sample size is 36 are drawn randomly…

A: From the provided information, Mean (µ) = 45 Standard deviation (σ) = 20 X~N (45, 20) Sample size…

Q: You are to write down on a piece of paper the number of credits you are taking this semester. Your…

A: Give the general format for solving this problem as below. Summarize the recorded date of number of…

Q: Assume that the heights of men are normally distributed with a mean of 71.3 inches and a standard…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: A survey has found out that a family generates an average of 17.2 pounds of garbage per week. Assume…

A: The mean is μ=17.2 and the standard deviation is σ=2.5 The population size is n=55 Therefore the…

Q: Assume that the heights of women are normaly distributed with a mean of 63.6 inches and a standard…

A: Given,   Mean = 63.6 Standard deviation = 2.5 Sample size = 100   The objective is to find the…

Q: A population has a mean of 84 and a standard deviation of 12. A sample of 36 observations will be…

A: Mean = 84 Standard deviation = 12 Sample size = 36

Q: Find the probability that a sample of 18 has a sample mean below 32. The population mean is 24 and…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: If the probability of defective bolt is 0.1, find the mean and the standard deviation for the number…

A: Given the probability of a defective bolt is, 0.1 That is, p=0.1 The total number of bolts is, n=400…

Q: The average life of a brand of automobile tires is 30,000 miles, with standard deviation of 2,000…

A: Mean = 30000 Standard deviation = 2000

Q: On the daily run of an express bus, the average number of passengers is 48. The standard deviation…

A: Let "X" be the average number of passengers on the daily run of an express bus.

Q: A normal distribution is observed from the body weights of the forty students in a class. If the…

A: Given information Mean (µ) = 125 Standard deviation(σ) = 9 As per empirical Rule 68% falls within…

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: Given Information: Mean μ=196 Standard deviation σ=22 Let X denote the number of red meat a person…

Q: he average number of minutes per week that teenagers spend texting is 240.0 . Assume the standard…

A: Given data, μ=240σ=72If n=64P(230<X<250)=?

Q: art professor gives an A to any student in the top 9% of the distribution. The grades are normally…

A: Given X~N(mean μ=60, standard deviations σ=5) P(X>b)=9%

Q: Assume that adults have IQ scores that are normally distributed with a mean of 103.6 and a standard…

A: Given that adults have IQ scores that are normally distributed with, Mean = 103.6 Standard deviation…

Q: The average age of our class is 22.3 years. Standard deviation is 4.7 years. If the variable is…

A:

Q: Find the probability that a randomly selected year of rain in Sydney, Australia has a yearly…

A: Given Population mean μ=137, population standard deviations σ=69, Let X be the rain in Sydney Note:…

Q: A successful basket ball player has a height of 6 feet 4 inches. Based on statistics his height…

A: As given, The basketball player has a height of 6 feet 4 inches and when his height is converted to…

Q: The body temperatures of adults are normally distributed with a mean of 98.6° F and a standard…

A: Z= x¯-μσn~N(0,1) n  = 36 , x¯ = 98.6 , μ = 98.6 , σ = 0.6

Q: The average score of all golfers for a particular course has a mean of 66 and a standard deviation…

A:

Q: Assume that the heights of men are normally distributed with a mean of 69.5 inches and a standard…

A: It is given that  Mean, μ = 69.5 Standard deviation, σ = 2.1 Sample size, n = 36

Q: The average amount customer spend yearly at a local grocery store is $635.55 .  Assume the variable…

A: Mean(µ) = $635.55Standard deviations (σ) = $94.41X ~ N (µ, σ )= N(635.55,94.41)

Q: On the daily run of an express bus, the average number of passengers is 48. The standard deviation…

A: Mean = 48 Standard deviation = 3

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

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

Q: The amount of snowfall falling in a certain mountain range is normally distributed with a mean of 80…

A:

Q: The average height of flowering cherry trees in a nursery is 11 feet. If the heights are normally…

A: From the provided information, Mean (µ) = 11 Standard deviation (σ) = 1.6 X~N (11, 1.6) Here X be a…

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the…

A: Reviewing information, Given, X : Individual's IQ score X~N(μ=100 , σ=15)

Q: Assume that an individual's golf scores are normally distributed with a mean of 90.4 and a standard…

A:

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: Solution-: Given: μ=196,σ=22,n=50 Let, X= be the random variable We want to find P(the mean of…

Q: Assume that adults have scores that are normally distributed with a mean of 100 and a standard…

A: Given Mean=100 Standard deviations=15

Q: Aceume that an individual'e golf ecoree are normally dietributed with a mean of and a otandard…

A:

Q: Assume that an individual's golf scores are normally distributed with a mean of 90.4 and a standard…

A: Normal Distribution  u = 90.4 n = 5.3 p(87 < x < 95) = ?

Q: Assume that the heights women are normally distributed with a mean of 63.6 inches and a standard…

A:

Q: Assume that blood pressure readings are normally distributed with a mean of 124 and a standard…

A: Sample size [n] =64Mean =124Standard deviation =6.4