1. The number of motorcycles sold manually by salesperson is normally distributed with a standard deviation of 15. A random sample of 300 salesperson taken and the mean number of motorcycles sold manually was found to be 75. Find the 99% confidence interval estimate of the population mean. Answer: 73-77 Just show solution on how to get that answer.

Q: On a final  examination in mathematics , the mean was 72  and standard deviation was 15 . Determine…

A: given information: μ=72σ=15x=65 we want to determine the z score . z=x-μσ  =65-7215  =-0.4667

Q: We want to estimate the mean Midichlorian count for the population of Jedi. How many Jedi must be…

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Q: The Sum of Squared Errors for a data set of 18 numbers is 36. What is the standard deviation?

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Q: The population mean is 75 and the population standard deviation = 6. Random samples (containing 16…

A: Given , The population mean ( n )   = 75 ,  the population standard deviation ( σ )= 6

Q: An educational study to be conducted requires a test score in the middle 40% range. If the mean is…

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Q: A simple random sample of 36 observations was taken from a large population. The sample mean and the…

A: The sample mean and the standard deviation are μ = 80 and σ = 12 respectively.Let X denotes the…

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Q: What is the z-score for this raw score?

A: Let ,  Our aim is to find the Z-score .

Q: Suppose the prevalence of type II diabetes in a community is 36%. Researchers want to sample 16…

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Q: A simple random sample of 100 observations was taken from a large population. The sample mean and…

A: Given that ,                    sample size n=100                    Mean u=80…

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A: Suppose that the random variable x defines the scores in psychology research.

Q: How many adults must be randomly selected to estimate the mean FICO (credit rating) score of working…

A: By using the provided information, We have 95% confidence level Margin of error = 4 Population…

Q: The number of assists per match for the setter on your school's volleyball team has a mean of 55 and…

A: Given,   Mean(μ) =55 Standard deviation(σ)=7

Q: n a qualifying examination for admittance to the BS Psycholo the mean score was 75 and the standard…

A: Given that  mean =75 ,s.d = 8

Q: What is the raw z-score?

A: Given information Population Mean = mu= 120 Standard deviation = s= 50 Raw score = x =65 Z score = ?

Q: For a random sample of  70  overweight men, the mean of the number of pounds that they were…

A: given data  n = 70 x¯ = 28 poundsσ = 3.8 poundsbest point estimate for population mean  = ?

Q: A population has mean 27 and standard deviation 12 . What is the data value that has a z-score of -2…

A: Given data, Mean=27 sd=12 z=-2 x=?

Q: Provide an appropriate response. Determine the sample size required to estimate the mean score on a…

A: Solution: From the given information, confidence level is 0.90, S=15 and E=4.

Q: The results of a common standardized test used in psychology research is designed so that the…

A: Given Population mean = 140 Population standard deviation = 40 Score =X= 44

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Q: What is the z-score for this raw score?

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Q: Skye High School has a total of 500 graduates.  The mean SAT score of Skye High School graduates is…

A: Given data,μ=947σ=205P(X≥1000)=?

Q: A statistics practitioner took a random sample of 54 observations from a population whose standard…

A: Given,sample size(n)=54sample mean(x¯)=109population standard deviation(σ)=32

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

A: Introduction: If P4 denotes the 4th percentile, then observations lie below P4 with 4% or 0.04…

Q: A simple random sample of 36 observations was taken from a large population. The sample mean and the…

A:

Q: The results of a common standardized test used in psychology research is designed so that the…

A: From the provided information, Mean (µ) = 175 Standard deviation (σ) = 10 X~N (175, 10) Here X be a…

Q: 1) After 5 pts were added to every score in a sample the mean is found to be 62 and the standard…

A: 5 is added to each value and the obtained mean and standard deviations are 62 and 12 respectively.

Q: The mean for data set is 59, the standard deviation is 4, and the z- score is 0.03, what is the raw…

A: Here given that the mean =59, standard deviation=4, z score=0.04, we need to find the raw score x.

Q: 5 will be drawn from a population of test takers with a mean of 150 and standard deviation 9. Find…

A: Given that  Sample size (n) = 75 Population mean (μ) = 150 Standard deviation (σ) = 9   We know that…

Q: there are 75 students in the class and 20 students are getting a+ grade in the class find the mean…

A:

Q: A population of scores has a mean of 56. In this population, a raw score of 40 corresponds to a z…

A: Given Information: A population of scores has a mean of 56. μ=56 Raw score X = 40 corresponds to a z…