You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals.From a random sample of 44 business days, the mean closing price of a certain stock was $124.01. Assume the population standard deviation is $964.The 90% confidence interval is ((Round to two decimal places as needed.)(1,1)MoreClear allFinal cheView an exampleGet more help -Help me solve thisMacBook AirDIISOF4F3%23834562QERYWEGHKト

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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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You are given the sample mean and population standard deviation .Use this information to construct 90% and 95% confidence intervals for population mean. Interpert the results and compare the widths of the confidence intervals from a random sample 60 dates the mean record high daily remperature in a ceratin city has a mean 86.17F .Assume the population standard deviation 14.20F
You measure 33 textbooks' weights, and find they have a mean weight of 70 ounces. Assume the population standard deviation is 8.6 ounces. Based on this, construct a 91% confidence interval for the true population mean textbook weight. Round z-values to 2 decimal places; round t-values to 3 decimal places. Round final answers to 2 decimal places. Select an answer
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Tina catches a 14-pound bass. She does not know the population mean or standard deviation. So she takes a sample of five friends and they say the last bass they caught was 9, 12, 13, 10, and 10 pounds. Find the t and calculate a 95% (α = .05) confidence interval.
Refer to the accompanying data set and construct a 95%confidence interval estimate of the mean pulse rate of adult females; then do the same for adult males. Compare the results. . 1. Construct a 95%confidence interval of the mean pulse rate for adult females. ____ bpm<μ<____ bpm (Round to one decimal place as needed.) 2. Construct a 95% confidence interval of the mean pulse rate for adult males. _____ bpm<μ<____ bpm (Round to one decimal place as needed.)
Suppose that textbook weights are normally distributed. You measure 30 textbooks' weights, and find they have a mean weight of 65 ounces. Assume the population standard deviation is 11.6 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight. Round answers to 2 decimal places.? ? ?
A sample mean, sample size, population standard deviation, and confidence level are provided. Use this information to complete parts (a) through (c) below. x=35, n=27, σ=5 confidence level=90% a. Use the one-mean z-interval procedure to find a confidence interval for the mean of the population from which the sample was drawn. The confidence interval is from _______ to _________. (Type integers or decimals rounded to one decimal place as needed.) b. Obtain the margin of error by taking half the length of the confidence interval. What is the length of the confidence interval? ____________ (Type an integer or decimal rounded to one decimal place as needed.) c. Obtain the margin of error by using the formula E=zα2•σn. Identify the critical value. zα2=____________ (Type an integer or decimal rounded to two decimal places as needed.) What is the margin of error obtained using the methods of parts (b) and(c)? _________ (Type an integer or decimal…
An important factor in selling a residential property is the number of people who look through the home. A sample of 17 homes recently sold in Buffalo, New York, area revealed the mean number looking through each home was 27 and the standard deviation of the sample was 8 people. Develop a 99% confidence interval for the population mean. (Use t Distribution Table.) (Round your answers to 2 decimal places.) A. Confidence interval for the population mean is between ___ and ____.
You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. From a random sample of 41 business days, the mean closing price of a certain stock was $124.74 Assume the population standard deviation is $10.58 The 90% confidence interval is (,). (Round to two decimal places as needed.)
You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. From a random sample of 31 business days, the mean closing price of a certain stock was $110.20. Assume the population standard deviation is $11.44. The 90% confidence interval is (). (Round to two decimal places as needed.) ...
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