Select all that apply concerning a confidence interval: O considers variations from sample to sample based on observations from a single sample O has practical use when determining whether to accept or reject a product or service Oits point estimate is the lower range

Assuming that the population is normally​ distributed, construct a 95​% confidence interval for the population mean for each of the samples below. Explain why these two samples produce different confidence intervals even though they have the same mean and range.   Sample​ A: 1    2    4    4    5    5    7    8    Full data set Sample​ B: 1    2    3    4    5    6    7    8         Question content area bottom Part 1 Construct a 95​% confidence interval for the population mean for sample A.   enter your response here≤μ≤enter your response here

Review the work below for calculating a confidence interval for a sample mean. Redo the work and confirm that it is correct, or correct it and note the errors. What is the final margin of error E? What is the final confidence interval? Offer an example of a population mean that would fit into the confidence interval. Offer an example of a population mean that would be outside of the confidence interval.

Sales personnel for Skilling Distributors submit weekly reports listing the customer contacts made during the week. A sample of 15 weekly reports showed a sample mean of 19.5 customer contacts per week. The sample standard deviation was 5.2. Provide a 90% confidence interval for the population mean number of weekly customer contacts for the sales personnel.

A real estate agent wants to know if tax assessors and real estate appraisers closely agree on the values of homes. A random sample of the two independent groups evaluated 12 homes. The data is given below.   Tax Assessors Real Estate Appraisers x̄1 = $102,344 x̄2 = $105,827 s1 = $3,952 s2 = $4,341 n1 = 12 n2 = 12   Construct a confidence interval for the mean difference in the home values for each group. A real estate agent wants to know if tax assessors and real estate appraisers closely agree on the values of homes. A random sample of the two independent groups evaluated 12 homes. The data is given below.   Tax Assessors Real Estate Appraisers x̄1 = $102,344 x̄2 = $105,827 s1 = $3,952 s2 = $4,341 n1 = 12 n2 = 12   Construct a confidence interval for the mean difference in the home values for each group.  (-6999, 33.302)  (-6998, 31.516)  (-8264, 1297.8)  (-6804, -161.5)

also, what is the lower and upper limits ?