KA large family-held department store had the business objective of improving its response to complaints. The variableof interest was defined as the number of days between when the complaint was made and when it was resolved. Datawere collected from 40 complaints that were made in the last year. Use the data to complete parts (a) through (d)below.Click the icon to view the data table.a. Construct a 99% confidence interval estimate for the population mean number of days between the receipt of acomplaint and the resolution of the complaint.The 99% confidence interval estimate is from(Round to one decimal place as needed.)View an exarComplaint DataDays Between Complaint and Resolution of Complaint3012623321531838ENMASONR2273131156747029days to days.Print461334110441022169420458110272240Done221221325521432-< answerIn

Answered: a. Construct a 99% confidence interval…

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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We take a sample of 218 men and find they have an average commute time of 32 minutes with a standard deviation of 7 minutes. a.) Construct a 95% confidence interval. b.) Describe the interpretation of the confidence level.
4. A recent survey of 349 people ages 18 to 29 found that 86% of them own a smartphone. Find the 99% confidence interval of the population proportion.
Please help me solve: A. how many subjects have at least one Rx B. construct a 99% confidence interval
2.) A survey of 200 college students revealed that 160 of them eat dessert daily. Construct a 95% confidence interval for the population proportion of college students who eat dessert daily. Can we claim that 75% eart dessert daily?
mean. Interpret the results and compare the widths of the confidence intervals. If convenient, use technology to construct the confidence intervals. A random sample of 40 home theater systems has a mean price of $138.00. Assume the population standard deviation is $17.80. Construct a 90% confidence interval for the population mean.
The relationship between sample size and the width of a confidence interval may be explained by the concept of ______ . Select one: a. z score b. point estimates c. sampling error d. descriptive statistics
b. In the year 2000, a survey of 1171 U.S. adults were asked who they felt was the greatest President. Of those surveyed, 397 reported that Abraham Lincoln was the greatest President. Use this data to construct a 99% confidence interval for the population proportion of all U.S. adults who would say that Abraham Lincoln was the greatest president before the year 2000. Answer using decimals and round to four decimal places
An advertising agency wants to estimate the response rate for a new flyer. The agency sent the flyer to 100 randomly selected people and received 12 orders. a. What is the point estimate for the population proportion? b. What is the standard error of the proportion? c. Find 94% confidence interval for the percentage of those people who will place an order.
Construct the confidence interval for the population mean u .c=.98, x=6.4, o=0.7, n = 40
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In a clinical trial of a certain drug, 17 subjects experience headaches among the 222 subjects treated with the drug. Construct a 90% (Wald) confidence interval estimate for the proportion of treated subjects who experience headaches, completing parts (a) through (d) below. a. Find the best point estimate of the population proportion. (Type an integer or a decimal rounded to three decimal places b. Identify the value of the margin of error E. needed.) Type an integer or a decimal rounded to three decimal places as needed.) c. Construct the confidence interval. 0
Tourism is extremely important to the economy of Florida. Hotel occupancy is an often-reported measure of visitor volume and visitor activity (Orlando Sentinel, May 19, 2018). Hotel occupancy data for February in two consecutive years are as follows, current year previous year occupied rooms 1470 1458 total rooms 1750 1800 a)What is the 95% confidence interval estimate of the change in occupancy for the one-year period? b)Do you think officials will be pleased with the results? c) Using a 0.05 level of significance, test the hypothesis that there has been an increase in the proportion of rooms occupied over the one-year period.

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a. Construct a 99% confidence interval estimate for the population mean number of days between the receipt of a complaint and the resolution of the complaint. The 99% confidence interval estimate is from (Round to one decimal place as needed.) days to days.