The age of customers for a particular retail store follows a normal distribution with a mean of 37.5 years and a standard deviation of 7.6 years. What percentage of customers are between 14.7 and 52.7 years of age?

Q: Assume that the hourly costs of operating a commercial aircraft are normally distributed with a mean…

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Q: Salaries for teachers in a particular elementary school district are normally distributed with a…

A: The properties of the normal distribution is,   The Normal distribution curve is and bell shaped…

Q: According to one study, the average hours of sleep on a weeknight for men was 6.9 hours with a…

A:

Q: A​ half-century ago, the mean height of women in a particular country in their 20s was 63.8 inches.…

A: Given data,μ=63.8σ=2.51If n=28P(X≥65.08)=?

Q: The ages of the members of a popular ski club is normally distributed with a mean of 46 years and a…

A: Given that the ages of the members of a popular ski club is normally distributed with a mean of 46…

Q: In a Normal distribution 7% items are under 35 and 89% are under 63. Find its mean and standard…

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Q: The following data represent the number of people aged 25 to 64 years covered by health insurance​…

A: Mean is one of the measures of central tendency and is the average value of the data set which tells…

Q: According to a recent survey, the salaries of assistant professors have a mean of $41,750 and a…

A: To get the proportion of professor who earn more than $48,000 we proceed as follows…

Q: Suppose the life span of a brand of lightbulbs is normally distributed with a mean of 2000 hours and…

A: It is given that  Mean, μ = 2000 Standard deviation, σ = 320 Z-Score, Z = ( X - μ )/σ

Q: An advertising agency has stated that 20% of all television viewers watch a particular program. How…

A: From the provided information, An advertising agency has stated that 20% of all television viewers…

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: The following data represent the number of people aged 25 to 64 years covered by health insurance​…

A: Solution Age Number (f) Midpoint (x) f*x x2 f*x2 25-34 27.3 29.5 805.35 870.25 23757.825…

Q: The mean annual income for people in a certain city (in thousands of dollars) is 42, with a standard…

A: The formula for mean of the Z-score is, Z=x¯-μσn Here n is the sample size, μ is the population mean…

Q: According to a recent survey, the salaries of assistant professors have a mean of $41,750 and a…

A: Given information Mean µ = 41750 Standard deviation σ = 7500 proportion of assistant professors who…

Q: A large company has many employees and the annual salaries of those employees follow a normal…

A: X follows a Normal distribution with mean = 70000 and S.D = 12000 Then z=(x-mean)/SD =…

Q: The average hours of sleep on a weeknight was 6.9 hours with a standard deviation of 1.5 hours. What…

A: Introduction: Denote the random variable, Denote X as the number of hours of sleep on a weeknight.…

Q: A study has shown that 15% of all college textbooks have a price of $178.52 or higher.  It is known…

A: From the provided information Standard deviation (σ) = $32.55 Let X be a random variable which…

Q: A normal distribution has a mean of 62 and a standard deviation of 12. What is the median?

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

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Q: Hogie lizards have tail lengths that are normally distributed with a mean of 22.5 cm and a standard…

A:

Q: Assume that the heights of men applying for Us Military training are normally distributed with a…

A: Given, Assume that the heights of men applying for Us Military training are normally distributed…

Q: What proportion of skiers will finish the race in exactly one minute?

A: The tume it takes for downhill skiers to finish a race follows a Normal distribution with a mean of…

Q: Salaries for Macdonald's workers are normally distributed with a mean of $30,000 and a standard…

A: Given: μ=30000 and σ=5000. From the given information:PZ<z=95%⇒PZ<z=0.95

Q: Assume that the heights of men applying for military academy training are normally distributed with…

A:

Q: The cost of repairs for a fleet of motorcycles follows a normal distribution, with a monthly average…

A: Given Information: Mean value (u) = $ 1280  Standard deviation (s) = $ 420

Q: Find the standard error. Answer 2.8 O 16.6 O 1.96 O 0.4733 O 15.67<μ <17.53

A: Standard error=Standard deviation/sqrt(sample size)

Q: A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose…

A: A) option A is the answer. Answer : Since the distribution of time spent eating and drinking each…

Q: A candy store sells about 8 million pieces of candy per day with a standard deviation of 300,000…

A: Given : Let X : Number candy that they sell in a given day           μ = 8 million i.e   Mean (μ) =…

Q: he following data represent the number of people aged 25 to 64 years covered by health insurance​…

A:

Q: percent of men meeting these height requirements.

A: Assume that the heights of American men are normally distributed with a mean of 69.0 inches and a…

Q: The following data represent the number of people aged 25 to 64 years covered by health insurance​…

A: The question is about frequency distribution.Given :

Q: Suppose the annual employer 401K cost per participant is normally distributed with a mean of $770.…

A: Let X be the random variable representing the cost per participant. Then, X~N(μ,σ2),where…

Q: Suppose the durations of human pregnancies follow a mound-shaped distribution with a mean of 266…

A:

Q: According to a recent survey, the salaries of assistant professors have a mean of  $40,756  and a…

A:

Q: The commute tỉme for Cypress College students who drive from their home to the college follows a…

A: Here, µ = 26 and σ = 8.

Q: In a population of ages where the mean age is 45 and the standard deviation is 5.25, what are the…

A: Given Mean=45 Standard deviations=5.25

Q: Find the standard deviation of the following data: 13,18,13,14,13,16,14,21,13

A: Given data is13, 18, 13, 14, 13, 16, 14, 21, 13Sample size(n)=9

Q: A normal distribution has a mean of 3.7 and a standard deviation of 2.3. What is the median?

A: From the provided information,