QUESTION 21A random sample of 36 observations was used to estimate the mean SAT scores of applicants at a business college. The97% confidence interval was found to be (1695, 1825). If we are to increase the sample size to 40 (other factors remainunchanged), the 97% confidence interval for the mean SAT scores wouldbecome wider.be the same.Obecome narrower.be impossible to determine.

The data provided in the question is as follows:-Sample size andConfidence interval

Answered: A random sample of 36 observations was…

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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Out of 500 people sampled, 145 received flu vaccinations this year. Based on this, construct a 90% confidence interval for the true population proportion of people who received flu vaccinations this year.Give your answers as decimals, to three places
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Suppose you compute a confidence interval with a sample size of 25. What will happen to the confidence interval if the sample size increases to 37? The confidence interval will widen. The confidence interval will narrow. The width of the confidence interval will stay the same.
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You want to create a confidence interval for the difference in the percent of people over 40 who took music lessons as children and the percent of people 20-40 who took music lessons as children. You decide to use the Plus Four method. You ask 30 people over 40 and find that 21 of them took music lessons as children. You ask 25 people 20-40 and find that 13 took music lessons as children. Fill in the blanks for what you would put into your calculator's interval function. Have people over 40 be group 1. X1 = n1 = X2 = n2 =
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