Estimate the population mean by finding a 98% confidence interval given a sample of size 54, with a mean of 49.2 and a standard deviation of 7.4. Preliminary: a. Is it safe to assume that n ≤ 0.05 of all subjects in the population? من Yes No b. Is n 30? Yes No Confidence Interval: What is the 98% confidence interval to estimate the population mean? Enter your answer as an open-interval (i.e., parentheses) accurate to one decimal place. 98% C.I. =||

Q: uct a 90% confidence interval to estimate the population mean using the data below. = 80 6 = 15 n=…

A: The given information are: x¯=80, σ=15, n=40 and N=400. Where n is the sample size, x¯ is the sample…

Q: You are interested in estimating the the mean age of the citizens living in your community. In order…

A: Obtain the sample size. The sample size is obtained below as follows: The formula of sample size is,

Q: Construct the confidence interval for the population mean μ.   c=0.95​, x=5.7​, σ=0.3​, and n=43 A…

A: Given, x¯ = 5.7σ = 0.3n = 43confidence level α = 0.05 Critical value Zα2 = 1.96

Q: Suppose the 90% confidence interval for a population mean is (20, 55). What is the point estimate…

A:

Q: A researcher wants to make a 99% confidence interval for the population mean. She wants the maximum…

A: Solution: From the given information, confidence level is 0.99, σ=18.65 and E=4.8.

Q: Forty-nine items are randomly selected from a population of 500 items. The sample mean is 40 and the…

A: Given Data : Sample Size, n = 49.0 Sample Mean, x̄ = 40.0 standard…

Q: Use the given confidence interval to find the margin of error and the sample proportion.…

A: According to the given information, we have Confidence interval = (0.690, 0.718)

Q: A researcher wants to make a ninety-five percent confidence interval for the population mean. She…

A: From the given information,Margin of error , E = 0.56 Population variance, 7.6 Using formula ,

Q: Assume that population mean is to be estimated from the sample described. Use the sample results to…

A:

Q: A sample of 700 from population A has a proportion of interest of 0.24 while a sample of 600 from…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: A simple random sample of 90 items resulted in a sample mean of 60. The population standard…

A: Sample  size(n)=90sample mean()=60Standard deviation()=15

Q: Use the confidence interval to find the estimated margin of error. Then find the sample mean.   A…

A:

Q: Construct a 99% confidence interval to estimate the population mean using the data below. x=37 o=11…

A:

Q: Estimate the population mean by finding a 99% confidence interval given a sample of size 9, with a…

A:

Q: Jennifer decides that she wants to know the 85 % confidence interval for a population mean despite…

A: Suppose µ is the population mean.

Q: Construct the confidence interval for the population mean μ.   c=0.90​, x=16.3​, σ=5.0​, and n=95…

A: Construct the confidence interval for the population mean μ.   c=0.90​, x=16.3​, σ=5.0​, and n=95…

Q: You are interested in estimating the the mean age of the citizens living in your community. In order…

A: Determine the value of sample size n. The value of sample size n is obtained as shown below: Use…

Q: You are interested in estimating the the mean age of the citizens living in your community. In order…

A: Population standard deviation is 25. The z-critical value for 97% confidence interval is 2.1701…

Q: You are interested in estimating the the mean age of the citizens living in your community. In order…

A: Given data,E=3σ=18z-value  at 95% confidence is Zc=1.96n=?