- XTechnology ResultsPooled proportion: 0.33Test statistic, z: 11.0845Critical z: 2.3264P-value: 0.000098% Confidence interval:0.3906998 < p1- P2 <0.5632751PrintDone latex gloves, 9% leaked viruses. Using the accompanying display of the technology results, and using a 0.01 significance level, test the claim that vinyl gloves havea greater virus leak rate than latex gloves. Let vinyl gloves be population 1.A newspaper published an article about a study in which researchers subjected laboratory gloves to stress. Among 239 vinyl gloves, 57% leaked viruses. Among 239Click the icon to view the technology results.What are the null and alternative hypotheses?O B. Ho: P1= P2O C. Ho: P1> P2O A. Ho: P1 =P2H1: P1 P2H1: P1 = P2H1: P1< P2O E. Ho: P1= p2O F. Ho: P1 P2O D. Ho: P1 P2

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Answered: latex gloves, 9% leaked viruses. Using…

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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How tp use a sample mean to calculate a confidence interval?
Two types of valves are being tested to determine if there is a difference in pressure tolerances. Fifteen out of a random sample of 100 of Valve A cracked under 4,500 psi. Six out of a random sample of 100 of Valve B cracked under 4,500 psi. Construct the 99% confidence interval for the difference of the two populations proportions.
Animal Bites of Postal Workers In Cleveland, a sample of 71 mail carriers showed that 8 had been bitten by an animal during one week. In Philadelphia, in a sample of 54 mail carriers, 13 had received animal bites. Is there a significant difference in the proportions? Use a= .01 and use p1 for the proportion of mail carriers in Cleveland. Find the 99% confidence interval for the difference of the two proportions and round all intermediate calculations to at least three decimal places. State the hypotheses and identify the claim H0: H1: one tailed or two tailed Find the critical value(s). Round the answer to at least three decimal places and ensure your degrees of freedom are correct before proceeding. If there is more than one critical value, seperate them with commas. Critical value(s)= Compute the test value. Round the answerto at least two decimal places. z= Reject or do not reject the null hypothesis Is there enough evidence to support the claim Find the 99% confidence interval…
A telephone service representative believes that the proportion of customers completely satisfied with their local telephone service is different between the Midwest and the Northeast. The representative's belief is based on the results of a survey. The survey included a random sample of 1400 midwestern residents and 1320 northeastern residents. 50% of the midwestern residents and 38% of the northeastern residents reported that they were completely satisfied with their local telephone service. Find the 98% confidence interval for the difference in two proportions. Step 1 of 3: Find the critical value that should be used in constructing the confidence interval. Step 2 of 3: Find the value of the standard error. Round your answer to three decimal places. Step 3 of 3: Construct the 98% confidence interval. Round your answers to three decimal places.
Identify the y-score for a95% confidence interval if the sample size is 50.
Cell Phones and Cancer A study of 420,095 Danish cell phone users found that0.0321% of them developed cancer of the brain or nervous system. Prior to this study of cellphone use, the rate of such cancer was found to be 0.0340% for those not using cell phones. The data are from the Journal of the National Cancer Institute. 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?
In a population where the proportion of people who have the ability to taste umami is unknown, a random sample of 100 people were tested and 74 could clearly distinguish umami from saltiness. Calculate the 95% and 99% population proportion confidence intervals for this finding.
Athlete ages, again Using the summary statistics pro-vided in Exercise 12, the sports reporter calculated the following 95% confidence interval for the mean dif-ference between major league baseball players and professional football players. The 95% interval formMLB - mNFL was ( -0.41, 3.09). Summarize incontext what the interval means.
Pottery Archaeologists can use the chemical composi-tion of clay found in pottery artifacts to determine whether different sites were populated by the sameancient people. They collected five samples of Romano–British pottery from each of two sites in Great Britainand measured the percentage of aluminum oxide in each.Based on these data, do you think the same people usedthese two kiln sites? Base your conclusion on a 95%confidence interval for the difference in aluminum oxidecontent of pottery made at the sites. (A. Tubb, A. J. Parker,and G. Nickless, “The Analysis of Romano–BritishPottery by Atomic Absorption Spectrophotometry.”Archaeometry, 22[1980]:153–171) Ashley Rails 19.1 14.8 16.7 18.3 17.7New Forest 20.8 18.0 18.0 15.8 18.3
Given that the sample proportion of Americans who are dissatisfied with the quality of education is 0.53 and the sample size is 1012. a. Verify that the sample is large enough to use the normal formula to find a confidence interval for the proportion of Americans who are dissatisfied with the quality of education students receive in kindergarten through grade 12. b. Construct a 90% confidence interval for the proportion of U.S. adults who are dissatisfied with the quality of education students receive in kindergarten through grade 12. Use three decimal places in your margin of error. c. Provide an interpretation of your interval in the context of this data situation.
The prevalence rate of osteoporosis among women were measured in a survey, p(%) = 25.3 SE (p) = 1.8 calculate the upper bound of 95% confidence interval
True or False? When calculating a confidence interval for one sample with a continuous outcome and the sample contains fewer than 30 individuals, then a t-score should be used in place of a z-score.

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