Q84.55566666666.36.56.56.56.56.56.56.57777777777777.57.57.57.57.57.57.588888888888888.58.58.599 the next questions, assume that the individuals who answered this survey can beConsidered a simple random sample from some broader population of interest(e.g., undergraduate students at a college). This will be the population about whichyou will be making inference.a. Calculate a 95% confidence interval for the mean number of hours slept in thePopulation, using the one-sample t confidence interval procedure.b. Doctors recommend 8.0 hours of sleep per night. Does the population sleepfewer hours per night, on average, than this recommendation?Answer this question using a one-sample t test with a=.05. State yourconclusionc. Discuss whether the data meet the distributional and sample size requirementsfor the t procedures you used in part a and b

Data 4.5 5 5 6 6 6 6 6 6 6 6.3 6.5 6.5 6.5 6.5 6.5 6.5 6.5 7…

Answered: a. Calculate a 95% 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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K A large family-held department store had the business objective of improving its response to complaints. The variable of interest was defined as the number of days between when the complaint was made and when it was resolved. Data were 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 a complaint and the resolution of the complaint. The 99% confidence interval estimate is from (Round to one decimal place as needed.) View an exar Complaint Data Days Between Complaint and Resolution of Complaint 30 12 6 23 32 153 18 38 ENMASONR2 27 3 131 15 6 74 70 29 days to days. Print 46 133 41 104 4 10 22 16 94 20 45 81 10 27 22 40 Done 2 21 22 13 25 52 14 32 - < answer In
1. The data below represent the repair cost for a low-impact collision in a simple rnadom sample of mini- and -micro vehicles $3148 $1758 $1071 $3345 $743 $2057 $663 $2637 $773 $1370 1a. Determine the point estimate of the population mean. Use the appropriate notation. 1b. Determine the margin of error for the 90% confidence interval. Use appropriate notation. 1c. Specify the 90% confidence intervalUse appropriate interval notation. 1d. Give a brief intperetation of the confidence intervalas related to repair costs. 2. Use the data from the problem #1. Assume a probability normal probability plot suggest the data could come from a population that is normally ditrubuted. A bocplot does not show outliers. Does the sample evidence suggest the cost of repairs to exceed $1200? 2a. what type of test should we use? ____ sample ___ - test for the _____ 2b. Write the hypothesis and specify the type of testing (failing). Use appropriate notation for the hypothesis. Hypothesis: Tailing:…
1a) Work Time Lost due to Accidents At a large company, the Director of Research found that the average work time lost by employees due to accidents was 97 hours per year. She used a random sample of 22 employees. The standard deviation of the sample was 5.8 hours. Estimate the population mean for the number of hours lost due to accidents for the company, using a 90% confidence interval. Assume the variable is normally distributed. Use a graphing calculator and round the answers to the nearest whole number. ___ < μ < ___ 1b) Hospital Noise Levels For a sample of 26 operating rooms taken in a hospital study, the mean noise level was 43.9 decibels, and the standard deviation was 8.9. Find the 97% confidence interval of the true mean of the noise levels in the operating rooms. Assume the variable is normally distributed. Use a graphing calculator and round the answers to at least one decimal place. ___ < μ < ___ 1c) Unhealthy Days in Cities The number of unhealthy days…
1. The data in the file represent egg and cheese symbolizes the total fat, in grams per serving, for a sample of 20 egg and cheese sandwiches from a fast food restaurant. The data are as follows: 7 8 3 5 15 21 22 24 18 33 23 31 25 19 29 29 29 30 41 55 1. Find the mean, mode and the median. 2. Construct 95% confidence interval for the population mean total fat, in grams preserving.
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Kenneth, a competitor in cup stacking, claims that his average stacking time is 8.2 seconds. During a practice session, Kenneth has a sample stacking time mean of 7.8 seconds based on 11 trials. At the 4% significance level, does the data provide sufficient evidence to conclude that Kenneth's mean stacking time is less than 8.2 seconds? Accept or reject the hypothesis given the sample data below. H0:μ=8.2 seconds; Ha:μ<8.2 seconds α=0.04 (significance level) z0=−1.75 p=0.0401 Select the correct answer below: a. Do not reject the null hypothesis because the p-value 0.0401 is greater than the significance level α=0.04. b. Reject the null hypothesis because the p-value 0.0401 is greater than the significance level α=0.04. c. Reject the null hypothesis because the value of z is negative. d. Reject the null hypothesis because |−1.75|>0.04. e. Do not reject the null hypothesis because |−1.75|>0.04.
How many subjects would be needed to ensure that a 95% confidence interval estimate of BMI had a margin of error not exceeding 2 units? 25 27 31 33 26 28 38 41 24 32 35 40
A study of 420 comma 026 cell phone users found that 140 of them developed cancer of the brain or nervous system. Prior to this study of cell phone use, the rate of such cancer was found to be 0.0434 % for those not using cell phones. Complete parts (a) and (b). a. Use the sample data to construct a 90% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system. b. Do cell phone users appear to have a rate of cancer of the brain or nervous system that is different from the rate of such cancer among those not using cell phones? Why or why not?
1. What is the point estimate for the difference between the two population means? For which round is the population mean score lower? 2. Develop a 90% confidence interval estimate for the difference between the population means. Use the single population methodology where the confidence interval is given by . Notice that 0 is in this interval: what does this say about the statistical significance of the difference in the means? Player Round 1 Round 2 Michael Letzig 70 72 Scott Verplank 71 72 D.A. Points 70 75 Jerry Kelly 72 71 Soren Hansen 70 69 D.J. Trahan 67 67 Bubba Watson 71 67 Reteif Goosen 68 75 Jeff Klauk 67 73 Kenny Perry 70 69 Aron Price 72 72 Charles Howell 72 70 Jason Dufner 70 73 Mike Weir 70 77 Carl Pettersson 68 70 Bo Van Pelt 68 65 Ernie Els 71 70 Cameron Beckman 70 68 Nick Watney 69 68 Tommy Armour III 67 71
1. At the 95% confidence what is the margin of error? 2. Determine a 95% confidence interval estimate for the mean weight of the carry on luggage

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