A set of exam scores is normally distributed with a mean = 74 and standard deviation = 10. %3D Use the Empirical Rule to complete the following sentences. 68% of the scores are between and 95% of the scores are between and 99.7% of the scores are between and

Q: distribution of the sample mean whern Normal with mean p and variance o. Normal with mean o and…

A: The sampling distribution of a statistic is known as the the probability distribution of all the…

Q: Suppose SAT Mathematics scores are normally distributed with a mean of 21 and a standard deviation…

A: The random variable SAT Mathematics score follows normal distribution. The population mean is 21.…

Q: The average high temperatures in January for New York City, between 1986 and 1998, are recorded in…

A: Introduction: Sample Standard deviation:  The population standard deviation measures Variability…

Q: In a sample of 152 people the average score was 74 with a standard deviation of 6. What is the…

A: Sample size = n = 152   Mean = 74  Standard deviation = 6

Q: QUESTION 6 Given an x-mean of 15 and a y-mean of 12.2, calculate the crossproduct of x=15 and y=8.

A: When x=15 and y=8 Crrosproduct =x*y = 15*8

Q: ssume the average price for houses in a certain country is $294,000 with a standrad deviation of…

A: The coefficient of variation (CV) is a measure of relative variability. It is the ratio of the…

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

A: Excel formula: =NORMINV(0.305,0,1)=-0.5100

Q: Samples of size n=4000 are randomly selected from a population of homeowners in Florida. The square…

A: Samples of size n=4000

Q: Heights for group of people normally distributed with mean = 65 inches and standard deviation = 2.8…

A: Let us denote H as the heights follows normal distribution with mean 65 and standard deviation of…

Q: The department of public safety has an old memo stating that the number of accidents per week at a…

A: From the provided information, Sample size (n) = 52 Sample mean (x̅) = 2 Population standard…

Q: Suppose that the amount of time per day that American adults spend on their mobile devices is…

A: GivenMean(μ)=229standard deviation(σ)=57

Q: Find Ztest Round your answer to the nearest hundredth A

A: n=100, x¯=703μ=720,σ=92

Q: The average time for a student to complete this quiz is 24 minutes with a standard deviation of 2…

A: We have given that,  The students quiz are normally distributed with mean(mu) = 24 and standard…

Q: Police Academy Acceptance Exams In order to qualify for a police academy, applicants are given a…

A: Here it is given that the physical fitness scores are normally distributed with mean=56 and SD=8. We…

Q: IQ scores have a bell-shaped distribution with a mean of 100 and a standard deviation of 15. a. What…

A: Given DataMean = 100Standard Deviation = 15

Q: The FICO credit score is used by banks and other lenders to determine whether someone is a good…

A: Sample size(n)=100Sample mean()=703Population standard deviation()=92and

Q: each set of data, use the calculator to find the mean (xbar) and standard deviation (sx) 23, 14 ,65…

A:

Q: (Round to three decimal places as needed) (e) Using the normal model from part (c), find the…

A: We have given thatMean() = 1246.9standard deviation () = 101.6

Q: The mean of the population is 50. The standard deviation is 10. If a person row score is 47 (a)…

A: The mean of the population is 50. The standard deviation is 10. If a person row score is 47 (a)…

Q: uppose you know that the amount of time it takes your friend Susan to get from her residence to…

A: It is given that the mean and standard deviation are 50 and 5, respectively.

Q: Use z scores to compare the given values. ha recent awards ceremony, the age of the winner for best…

A: Given data,For Best ActorMean μ=45.4sd      σ=5.1Age of best actor is x=38For Best ActressMean…

Q: An article in the San Jose Mercury News stated that students in the California state university…

A: Given that  x¯=5.1n=47s=1.2df=n-1=47-1=46confidence level=95%significance level=5% t critical…

Q: Score for the California Peace Officer Standards and Training test are normally distributed, with a…

A: Given X is normal Distributed with mean µ = 69.6 and standard deviation σ = 11.3 now will use…

Q: the mean is 146, and standard deviation is 35. A score of 181 is how many z-scores above the mean?

A:

Q: Using these reading scores  7, 7, 14, 9, 10, 8, 11, 14, 13, 14, 15, 15 and knowing the mean of the…

A: The data are 7, 7, 14, 9, 10, 8, 11, 14, 13, 14, 15, 15

Q: Two samples are randomly selected from a population. One sample has n = 5 and the second has n = 30.…

A: In this case, there are two samples. One sample has size of n = 5 and another has size of n = 30.

Q: uppose the scores of students on a Statistics course are Normally distributed with a mean of 596 and…

A:

Q: The distribution of heights in a population of women is approximately normal. Sixteen percent of the…

A: given data  normal distribution empirical rule: approximately 68 -95 -99.7% data fall within 1σ…