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

From the above data The correct option are Consider variations from sample to sample Has practical…

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Construct a 90% confidence interval to estimate the population mean using the data below. What assumptions need to be made about this population? x=38 s=9.9 n=24 Click here to view page 1 of the critical t-score table. Click here to view page 2 of the critical t-score table. Question content area bottom Part 1 The 90%confidence interval for the population mean is from a lower limit of here to an upper limit of (Round to two decimal places as needed.) Part 2 What assumptions need to be made about this population? A. The population distribution is skewed to one side. B. The population size is larger than 30. C. The population follows the Student's t-distribution. D. The population follows the normal probability distribution.
Which calculator function should be used to construct a confidence interval estimate for a population proportion? O a. TInterval O b. ZInterval O c. 1-PropZInt
Use the sample data and confidence level given below to complete parts (a) through (d). A drug is used to help prevent blood clots in certain patients. In clinical trials, among 4321patients treated with the drug, 148 developed the adverse reaction of nausea. Construct a 95% confidence interval for the proportion of adverse reactions. a) Find the best point estimate of the population proportion p. ______________ (Round to three decimal) b. identify the value of the margin of error E E=______________ c. construct the confidence interval _____<p<________ d. write a statement that correctly interprets the confidence interval.
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
0.56 ppm is the maximum authorized concentration of phosphate in drinking water. Given below is the analysis of various samples of bottled water from the same batch of production. Is there an outlier present in the data set at 95% confidence interval? What is the t-tab and t-calc for the data set? Can the water be used for drinking? Use outlier tests Sample Phosphate (ppm) 1 0.26 2 0.46 3 0.41 4 0.49 5 0.38
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 ?
Construct a 90% confidence interval to estimate the population mean using the data below. What assumptions need to be made about this population? X̄=37 s=9.1 n=25 **Round to two decimal places as needed.**

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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