You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures:- 22.4- 36.1- 43.5- 18- 43.8- 27.4- 23.7- 4.9- 26.5Find the 80% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places (because the sample data are reported accurate to one decimal place).80% C.I. = (______)Answer should be obtained without any preliminary rounding.

Answered: must estimate the mean temperature (in…

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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need margin of error and 90% interval
Construct a confidence interval for the ratio of the population variances given the following sample statistics. Round your answers to four decimal places. n1=9, n2=18, s1^2/s2^2=1.17, a=0.1
Noise levels at 6 airports were measured in decibels yielding the following data: 136,158,164,150,155,154 Construct the 90% confidence interval for the mean noise level at such locations. Assume the population is approximately normal. Copy Data Step 1 of 4: Calculate the sample mean for the given sample data. Round your answer to one decimal place. Step 2 of 4: Calculate the sample standard deviation for the given sample data. Round your answer to one decimal place. Step 3 of 4: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places. Step 4 of 4: Construct the 90%90% confidence interval. Round your answer to one decimal place. Lower end point, upper end point
Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made during the week. A sample of 85 weekly reports showed a sample mean of 18.5 customer contacts per week. The sample standard deviation was 5.4. Provide 90% and 95% confidence intervals for the population mean number of weekly customer contacts for the sales personnel. 90% confidence interval, to 2 decimals: 95% confidence interval, to 2 decimals:
You measure 48 textbooks' weights, and find they have a mean weight of 64 ounces. Assume the population standard deviation is 8.3 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight. Give your answers as decimals, to two places AFW
Construct the confidence interval for the ratio of the population variances given the following sample statistics. Round your answers to four decimal places. n1=20n1=20, n2=20n2=20, s12=57.405s12=57.405, s22=52.186s22=52.186, 95%95% level of confidence Copy Data
A survey of several 9 to 11 year olds recorded the following amounts spent on a trip to the mall: $19.26, $21.87, $15.83, $20.57, $19.31, $24.74, $22.82 Construct the 95% confidence interval for the average amount spent by 9 to 11 year olds on a trip to the mall. Assume the population is approximately normal. Copy Step 2 of 4: Calculate the sample standard deviation for the given sample data. Round your answer to two decimal places.
You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: 103 76.3 61.6 94 87.3 109.6 45.8 Find the 99% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places.
Country of Origin N Mean Std. Deviation China 50 22.5 9.75 America 30 33.15 11.6 What is the SE mean for the sales from china? Calculate a 95% confidence interval for the mean sales amount made in America. Use the statistical tables when necessary and show all workings
may i know the answer??????????
Quiz a sample of 18 units provided a sample variance of s = 0.36. Construct a 90 per cent confidence interval estimate of the population variance ? 8 Select one: 15 O a. 0.22 sa?50.71 O b. 0.12 so? s0.71 Finish O c. 0.12 so? s0.17 Time O d. 0.32 sa?s0.47
is B K In a study of government financial aid for college students, it becomes necessary to estimate the percentage of full-time college students who eam a bachelor's degree in four years or less. Find the sample size needed to estimate that percentage. Use a 0.02 margin of error and use a confidence level of 99%. Complete parts (a) through (c) below. NOV 16 a. Assume that nothing is known about the percentage to be estimated. n= (Round up to the nearest integer.) View an example Get more help. 69 CLEA MacBook Pro tv Clear all X Check answer rect:

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