Shoe sizes among adult males are normally distributed with mean 9.2 and standard deviation 2.6 inches. If 1000 men are sampled, how many would be expected to wear a size seven or smaller shoe?

Q: The heights of a particular type of tree are normally distributed with a mean height 20.2 feet and…

A: The heights of a particular type of tree are normally distributed with a mean height , μ = 20.2 feet…

Q: A) A bell-shaped distribution has a mean ?=1200 and standard deviation ?=340.  Find the proportion…

A: Theoretical distribution is a branch of a frequency distribution. The theoretical distribution…

Q: n this scenario, what is the test statistic? A linguist believes the average age children learn a…

A: Given: n= 21.0 ,x̄= 9.2 ,s= 2.5 µ= 10.0 ,degree of freedom= 20.0

Q: If a population has a standard deviation σ of 36 units, what is the standard error of the mean if…

A: The population standard deviation is 36.

Q: Consider a sample with a mean of 500 and a standard deviation of 100. What are the z-scores for the…

A: The mean is 500 and the standard deviation is 100.

Q: Suppose the heights of 10-year-old boys in the US vary according to a normal distribution with a…

A: The objective of this question is to find the percentile of a boy with a height of 140 cm given that…

Q: Medical research suggests that systolic blood pressure in adults is approximately normally…

A: Denote X as the blood pressure in adults. It is given that X is approximately normally distributed,…

Q: he length of 10 bolts are: 17.2,17.9,17.9,18.0,18.0,18.0,18.1,18.1,18.2,18.6 The mean is 18. Find…

A:

Q: The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a…

A: Given Mu=63 Standard deviations=5

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

A: Given that Mean = 6.9 and Standard deviation = 1.5 Formula z = (x - mean)/ SD

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: The lengths of pregnancies are normally distributed with a mean of 280 days and a standard deviation…

A:

Q: A certain dataset has the following values: Mean = 40; Median = 30; Mode = 30 What is the shape of…

A: It is an important part of statistics . It is widely used .

Q: The heights of a pediatricians three-year-old females are approximately normally distributed, with…

A:

Q: Assume that the weights of quarters are normally distributed with a mean 5.67 gram and a standard…

A: Given that, The weights of quarters are normally distributed with a mean 5.67 gram and a standard…

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: According to the Carnegie unit system, the recommended number of hours students should study per…

A: State the hypotheses. That is, there is no evidence to conclude that the statistics students' study…

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

A: Given Let X : The average hours of sleep on a weeknight mean = μ= 6.9  standard deviation = σ= 1.5…

Q: What is the standard deviation of the following sample data:  34, 31, 33, 17, 46, 48.

A: Given data is 34, 31, 33, 17, 46, 48.We have to find the standard deviation.

Q: In its Fuel Economy Guide for 2008 model vehicles, the Environmental Protection Agency gives data on…

A:

Q: Assume that the heights of women are normally distributed with a mean of 65.4 inches and a standard…

A: We have given that  Mean=μ=65.4 Standard deviation=σ=2.7 X~Normal(μ=65.4,σ=2.7)

Q: Consider a dataset with standard deviation 2, mean 6.2, and a total of 186 data points. What is the…

A: The given data is - Standard deviation (σ)=2 Mean(x)=6.2 Sample size(n)=186

Q: What is the formula for calculating the standard deviation of a set of n observations?

A: Introduction The standard deviation is one of the measures of variability.

Q: The daily sleep duration among college students is normally distributed with a mean of 7.13 hours…

A: Solution

Q: If the number of degrees of freedom for a chi-square distribution is 28, what is the population mean…

A: It is known that for chi-square distribution: μχ2=degree of freedom   So,μχ2=28

Q: ample standard deviation: 19.0, 24.0, 26.0, 31.0, 29.0, 20.0?

A: X is a discrete variable with sample standard deviation s  and range r. The relationship between s…

Q: In a random sample of 50 adults, the mean body mass index (BMI) was 27.7 and the standard deviation…

A:

Q: Suppose exam scores in a statistics class are normally distributed with a mean of 89 and standard…

A: Given data, Mean=89 sd=8 P(X<x)=0.45 x=?

Q: Square footage of homes are normally distributed with a mean of 1,200 square feet and a standard…

A: Square footage of homes are normally distributed with a mean of 1,200 square feet and a standard…

Q: are normally distributed with a mean of 100 and a standard deviation of 15. What IQ is in the 90th…

A: Kwe have to find out given probabiity..

Q: Six different rain gauges on campus recorded the following precipitations during the month of…

A: Here, x x-x (x-x)2 8.4 -1.63 2.6569 9.8 -0.23 0.0529 11.1 1.07 1.1449 4.6 -5.43 29.4849…

Q: when designing aircraft cabins, what ceiling height will alow 98% of men to stand without bumping…

A:

Q: The army reports that the distribution of head circumference among soldiers is approximately normal…

A: X follows a Normal distribution with mean = 22.8 and S.D = 1.1 Then z=(x-mean)/SD = (x-22.8)/1.1…

Q: The Sum of Squared Errors for a data set of 18 numbers is 64. What is the standard deviation?

A: Given thatThe sum of squared errors of data set (SS) = 64Number of data values in data set (n) =…

Q: standard deviation 0.9 minute. What proportion of the time does Mrs. Starnes finish an easy Sudoku…

A: It is given that  Mean, μ = 5.3 Standard deviation, σ = 0.9

Q: The standard deviation on a final examination was 9, while the mean grade was 72. The best 14% of…

A: GivenMean(μ)=72standard deviation(σ)=9

Q: 2. Maple tree diameters in a forest area are normally distributed with mean 10 inches and standard…

A: