QUESTION 9 If the population standard deviation is equal to 7.68 and the sample size is 117, what is the margin of error for the corresponding 97% confidence interval to estimate the population mean? Use Excel to calculate and round your answer to 2 decimals.

Q: A researcher found a 95% confidence interval for the proportion of college students who believe in…

A:

Q: You are interested in finding a 95% confidence interval for the mean number of visits for physical…

A: Given,mean(x¯)=13.6standard deviation (s)=9.1918sample size(n)=10degrees of…

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

A: Givenconfidence interval(c)=95%Margin of error(E)=200population standard…

Q: A population has mean 49 and standard deviation 5. What is the data value that has a z-score of 2?…

A:

Q: If you have 100 people in your sample, what would be the degrees of freedom you use to calculate the…

A: Given, n=100 Degree of freedom(df)=?

Q: The winning   score in 5 high school basketball games was recorded. If the sample mean is 62.3…

A: Given information- Sample size, n = 5 Mean, x-bar = 62.3 Sample standard deviation, s = 11.0 Since…

Q: A student scored 51 on a math achievement test for which the mean was 36 and the standard deviation…

A: From given data we have  Mean = 36 standard deviation = 6 X=51

Q: find the margin of error of a 99% confidence interval for the mean score of all student

A: It is given that  Sample mean = 93 Sample standard deviation, s = 7 Sample size, n = 30

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: How do I answer this question? Noise levels at various area urban hospitals were measured in…

A: We have given that,  Sample size (n) = 84 Sample mean (x-bar) = 61.2 Sample standard deviation (s) =…

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…

Q: When solving a problem related to one sample and the confidence interval of variance. Which table…

A:

Q: What is the formula for a deviation score from a population?

A: Formula :

Q: The sample mean is 32, the sample size is 16, sample standard deviation is 6, and the confidence…

A: Given information Sample size (n) = 16 Sample mean x̅ = 32 Standard deviation (s) = 6 Significance…

Q: George got a 75 on a math test. The reliability of the math test was .85 and the standard deviation…

A: Confidence Interval: A confidence interval, refers to the probability that a population parameter…

Q: Thirty randomly selected students took the calculus final. If the sample mean was 74.2 and the…

A: From the provided information, Sample size (n) = 30 Sample mean (x̅) = 74.2 Standard deviation (s) =…

Q: Construct a 99%cofidence interval for a population mean if we have a sample mean of 67.5 a sample…

A: x = 67.5S= 8.3n = 799% CI for μ=?

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: For a random sample of 10 men, the mean head circumference is x-bar= 57.3 cm and the sample standard…

A:

Q: State the equation for the 95% confidence interval?

A: The equation for confidence interval can be stated as: Here x̅ is the sample mean, Zα/2 is the…

Q: A sample of 30 distance scores measured in yards has a mean of 7, a variance of 16, and a standard…

A: Given statistics:Consider the variable x represents the distance scores in yards.The given…

Q: Find 95% confidence interval for the population mean, if the sample size is 40, the sample mean is…

A:

Q: You would like to estimate the variance and standard deviation for credit scores based on FICO.…

A: Construct the 95% confidence interval estimate for the variance of credit scores Obtain the critical…

Q: SHS Principal wishes to estimate the average number of hours that Grade 11 students study each week.…

A: Given that  Population standard deviation =2.6 Margin of error =E =0.5 99% confidence.

Q: you take a sample in equal 25 of test scores from a population. The sample mean is 38, and the…

A:

Q: Find the margin of error at a 80% confidence level for estimating the population mean if n = 31, 2 =…

A: According to given question, We have :- Sample size n= 31Sample standard deviation s  =  5Sample…

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

A:

Q: Find the margin of error at a 80% confidence level for estimating the population mean if n = 15, x =…

A: Given: Sample size n = 15 Sample mean X = 44 Sample standard deviation s = 10 Confidence level = 80%…

Q: As an electrical engineer, you have designed a new efficient light bulb. In order to predict its…

A: Formula  Used: Mean X = ∑FX∑F Standard deviation = ∑FX2-nX2∑F-1

Q: On a standardized test, Sara had a score of 93, which was exactly 2 standard deviations above the…

A: The normal distribution in the center is generally denser and basically less dense at tails. There…

Q: if you have a population standard deviation of 19 and a sample size of 4, what is your standard…

A: Given,standard deviation (σ)=19sample size(n)=4

Q: To celebrate the end of final exams you and friends head to a favorite downtown restaurant. You find…

A: Given data x=1.5 μ=2s=20 minutes=2060n=16

Q: Find the margin of error at a 80% confidence level for estimating the population mean if n = 16, =…

A: It is given that  n = 16 s = 10 x̄ = 32

Q: You wish to estimate the mean number of travel days per year for salespeople. The mean of a small…

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find…