please answer all with complete solution 5. Five learners from the whole classes of grade 11 students were randomlyselected and were asked about the average number of words that they canencode in two minutes using any word document processing software. Theresponses are as follows:229255280203229Estimate the average number of words encoded in two minutes of the grade 11students using a 99% confidence interval.

Answered: Image /qna-images/answer/5fd83722-94bc-4daa-826c-d20ab5eb4b31.jpg

Answered: 5. Five learners from the whole classes…

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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A sample of 250 items from lot A contains 10 defective items, and a sample of 300 itemsfrom lot B is found to contain 18 defective items. Construct a 98% confidence interval for the difference of proportions of defective items.
4) The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. A 90% confidence interval that results from examing 607 customers in Taco Bell's drive-through has a lower bound of 161.6 seconds and an upper bound of 164.7 seconds. What does this mean?
A yogurt company claims that it prints a free yogurt coupon under a randomly selected 20% of its lids. A loyal customer purchases 85 yogurt cups, and records whether each was a winner. After consuming all 85 cups, he is disappointed to see that only 12 (14.1%) of his yogurt cups contained coupon codes. He performs a 99% confidence interval for the proportion of yogurt cups containing coupon codes, obtaining (0.044, 0.238). What conclusion can the customer draw about the yogurt company’s claim? The company’s claim may be justified because 0.2 is in the confidence interval. The company’s claim is definitely justified because 0.2 is in the confidence interval. The company’s claim is not justified because the upper endpoint of the confidence interval is 0.238. The company’s claim is not justified because 12 out of 85 (0.141) is far less than 0.2.
The Okeechobee County Economic Development Board needs to estimate the proportion of all county residents who have earned at least a bachelor's degree. A random sample conducted by the Okeechobee County Economic Development Board found that 10.5% of all county residents held at least a bachelor's degree.Find three different confidence intervals - one with sample size 180, one with sample size 451, and one with sample size 621. Assume that 10.5% of the county residents in each sample have earned at least a bachelor's degree. Notice how the sample size affects the margin of error and the width of the interval.Report confidence interval solutions using interval notation. Report all solutions in percent form, rounded to two decimal places, if necessary. When n=180n=180, the margin of error for a 95% confidence interval is given by .When n=180n=180, a 95% confidence interval is given by . When n=451n=451, the margin of error for a 95% confidence interval is given by .When n=451n=451, a…
From a random sample of 185 children from school G, 108 indicated they wanted to study science in college. From a different random sample of 165 children from school H, 92 indicated they wanted to study science in college. Assuming all conditions for inference are met, which of the following is closest to the standard error for a confidence interval for the difference in population proportions between the two schools of children who want to study science in college?
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In a study of police gunfire reports during a recent year, it was found that among 540 shots fired by New York City police, 210 hit their targets; among 283 shots fired by Los Angeles police, 77 hit their targets. We want to use a 0.05 significance level to test the claim that New York police have a higher hit rate than the Los Angeles police. Let New York police be represented by p1. Construct a 95% confidence interval and then choose all that apply to this problem. A. Since zero is contained in the confidence interval there appears to be no differnece in the proportions B. New York police have a higer hit proportion than Los Angelos police C. Confidence interval: (-0.0004, 0.1303) D. We fail to reject the null hypothesis E. We should reject the null hypothesis F. Confidence Interval: (0.0396, 0.1729)
The St. Lucie County Economic Development Board needs to estimate the proportion of all county residents who have earned at least a bachelor's degree. A random sample conducted by the St. Lucie County Economic Development Board found that 19.3% of all county residents held at least a bachelor's degree.Find three different confidence intervals - one with sample size 254, one with sample size 478, and one with sample size 668. Assume that 19.3% of the county residents in each sample have earned at least a bachelor's degree. Notice how the sample size affects the margin of error and the width of the interval.Report confidence interval solutions using interval notation. Report all solutions in percent form, rounded to two decimal places, if necessary. When n=254, the margin of error for a 97% confidence interval is given by .When n=254, a 97% confidence interval is given by . When n=478, the margin of error for a 97% confidence interval is given by .When n=478, a 97% confidence interval…
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The Indian River County Economic Development Board needs to estimate the proportion of all county residents who have earned at least a bachelor's degree. A random sample conducted by the Indian River County Economic Development Board found that 28.7% of all county residents held at least a bachelor's degree. Find three different confidence intervals - one with sample size 387, one with sample size 556, and one with sample size 854. Assume that 28.7% of the county residents in each sample have earned at least a bachelor's degree. Notice how the sample size affects the margin of error and the width of the interval. Report confidence interval solutions using interval notation. Report all solutions in percent form, rounded to two decimal places, if necessary. When n=387 the margin of error for a 99% confidence interval is given by =When n=387, a 99% confidence interval is given by = When n=556, the margin of error for a 99% confidence interval is given by =When n=556, a 99% confidence…
During the referandum of 1986, candidate B12 showed the following pre-election voter support in Colorado and Alaska. Voters Surveyed Voters who FavoredCandidate B12 Colarado 550 290 Alaska 750 360 a). Develop a 95% confidence interval estimate for the difference between the proportion of voters who favored candidate B12 in the two polling states.
In a sample of 225 college seniors, 189 responded positively when asked if they have spring fever. Based upon this, compute a 95% confidence interval for the proportion of all college seniors who have spring fever. Carry the intermediate computations to at least three decimal places. Round the answers to two decimal places. (a) What is the lower limit of the 95% confidence interval? (b) What is the upper limit of the 95% confidence interval?

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