A lab course instructor would like to know the average time that student teams spend in the labclassrooms conducting experiments and collecting data. The instructor gets information from 45 teamsand calculates a 90% confidence level estimate of the average time to within +0.8 hours (that is,calculates the interval [average time - 0.8 h, average time + 0.8 h]). How many teams should provideinformation to the instructor to obtain a 90% confidence level estimate to within +0.4 hours?

The question is about sample size estimation.Introduction :The formula of sample size is given…

Answered: A lab course instructor would like to…

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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Similar questions

The data represent a sample of the number of home fires started by candles for the past several years. (Data are from the National Fire Protection Association.) Find the 99% confidence interval for the mean number of home fires started by candles each year. 5460, 5900, 6090, 6310, 7160, 8440, 9930.
A poll reported that only 645 out of a total of 2029 adults in a particular region said they had a "great deal of confidence" or "quite a lot of confidence" in the public school system. This was down 5 percentage points from the previous year. Assume the conditions for using the CLT are met. Find a 95% confidence interval for the proportion that express a great deal of confidence or quite a lot of confidence in the public schools, and interpret this interval. The 95% confidence interval for the proportion that express a great deal of confidence or quite a lot of confidence in the public schools is ____
You want to get a 95% confidence interval for the difference between the percentage of females with red hair compared to males with red hair. You sample 88 females and find 20 of them have red hair. You sample 79 males and find 36 have red hair. < p1−p2p1-p2 <
What does Level of Confidence indicates?
Find the value of t for the t distribution for the following. Area in the right tail = 0.05 and df = 13. Round your answer to 3 decimal places. i
A sample of 175 U.S. adults is composed of 100 women and 75 men. What is the estimate of the true proportion of males in the population with 99% confidence? Show work.
the sample proportion of females is x=118 n=164 P = .720 #1 Make a 95% confidence interval for the proportion of female students. What is the margin of error?
In a random sample of 1,250 adult drivers, 450 said they would cut their driving by 10 percent is this significantly helped the environment. Find a 95 percent confidence interval estimate of the proportion os adult drivers who are willing to cut their driving by 10 percent to help the enviroment.
A doctor would like to estimate the mean difference in the number of hours of sleep for seniors in high school and seniors in college. To do so, he selects a random sample of 50 high school seniors from all high schools in his county. He also selects a random sample of 50 seniors from the colleges in his county. He would like to construct a 95% confidence interval for the true mean difference in the number of hours of sleep for seniors in high school and seniors in college. Are the conditions for inference met? Yes, all three conditions for inference are met. No, the random condition is not met for both samples. No, the 10% condition is not met for both samples. No, the Normal/large sample condition is not met for both samples.
In a sample there are 234 people. If you were going to do a confidence interval for population mean what would the critical value be if the confidence level is 97% (round to 2 decimal places)
Suppose that a 92% Confidence Interval for estimating the average heights, in inches, of all college students is given by (66.66, 72.22). Find the margin of error.
A researcher takes a sample of 600 people and finds that 128 of them are paid the minimum wage. Construct a 95% confidence interval for the proportion of Seattle residents who earn the minimum wage. Then write a sentence explaining the Cl you found in the context of this researcher's findings.

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