A survey of 80 r/s SCC students shows that 54 of themhave a C-average or better. Perform a hypothesis test todetermine whether this survey result provides significantevidence that the overall percent of SCC students with a C-average or better is different from 60%.a) Clearly state the test hypotheses as follows:Letrepresent the overallLet H1:HO:b)Use an appropriate formula to calculate the test statistic.c)Use an appropriate table to find the p-value.d)Use the p-value to draw and explain your conclusion ofthe test.

Given that Sample size n =80 Favorable cases x =54 Sample proportion p^=x/n =54/80 =0.675 NOTE:-…

Answered: A survey of 80 r/s SCC students shows…

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 survey of 30 r/s students in a large college indicated that 19 of them held off-campus jobs. Does this survey result provide strong evidence that more than 50% of all studentsin this college hold off-campus jobs? Use an appropriate p-value to draw and explain your conclusion.
According to a certain government agency for a large country, the proportion of fatal traffic accidents in the country in which the driver had a positive blood alcohol concentration (BAC) is 0.33.Suppose a random sample of 109 traffic fatalities in a certain region results in 47that involved a positive BAC. Does the sample evidence suggest that the region has a higher proportion of traffic fatalities involving a positive BAC than the country at the α=0.05 level of significance?
In 2016, the US Department of Agriculture established a “maximum acceptable” salmonella prevalence of 15.4 percent for chicken parts sampled at the end of a slaughterhouse’s kill line. 54 of the 154 largest chicken-slaughter facilities in the US failed to meet this standard in 2018. Assume that these results are representative for all large chicken-slaughter facilities. Suppose that in a random sample of 60 chicken parts from the large ACME chicken-slaughter facility (which produces 1,000,000 chicken parts per year), 45 chicken parts test negative for salmonella. c) Estimate the number of chicken parts that are needed for a follow-up study with 90% power to test thenull hypothesis that the prevalence of salmonella among chicken parts at the ACME facility is equal to the maximum acceptable value.
In 2016, the US Department of Agriculture established a “maximum acceptable” salmonella prevalence of 15.4 percent for chicken parts sampled at the end of a slaughterhouse’s kill line. 54 of the 154 largest chicken-slaughter facilities in the US failed to meet this standard in 2018. Assume that these results are representative for all large chicken-slaughter facilities. Suppose that in a random sample of 60 chicken parts from the large ACME chicken-slaughter facility (which produces 1,000,000 chicken parts per year), 45 chicken parts test negative for salmonella. b) Estimate the number of facilities that are needed in a study to obtain 80% power to test the null hypothesis that the prevalence of failing to meet the chicken part salmonella standard among large chicken-slaughter facilities is 20%.
In 2016, the US Department of Agriculture established a “maximum acceptable” salmonella prevalence of 15.4 percent for chicken parts sampled at the end of a slaughterhouse’s kill line. 54 of the 154 largest chicken-slaughter facilities in the US failed to meet this standard in 2018. Assume that these results are representative for all large chicken-slaughter facilities. Suppose that in a random sample of 60 chicken parts from the large ACME chicken-slaughter facility (which produces 1,000,000 chicken parts per year), 45 chicken parts test negative for salmonella. a) Test the null hypothesis that the prevalence of salmonella among ACME chicken parts is 15.4%, usingthe p-value method.
Based on their records, a hospital claims that the proportion, p, of full-term babies born weigh over 7 pounds is 46%. A pediatrician who works with several hospitals in the community would like to verify the hopital's claim and investigates. In a random sample of 130 babies born in the community, 52 weighed over 7 pounds. Is there enough evidence to reject the hospital's claim at the 0.10 level of significance?Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. A. State the null hypothesis H0 and the alternative hypothesis H1 B. Would (Z) (t) (Chi-square) or (F) be the best statistic to use? C. Find the value of the test statistic. (Round to three or more decimal places.) D. Find the two critical values. (Round to three or more decimal places.) E. Can we reject the claim that the proportion of full-term babies born in the hospital that weigh more than 7 pounds is 46%? (Yes or no)
Based on their records, a hospital claims that the proportion, p , of full-term babies born weigh over 7 pounds is 45% . A pediatrician who works with several hospitals in the community would like to verify the hopital's claim and investigates. In a random sample of 130 babies born in the community, 70 weighed over 7 pounds. Is there enough evidence to reject the hospital's claim at the 0.10 level of significance? Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis H0 and the alternative hypothesis H1 . H0: H1: (b) Determine the type of test statistic to use. ▼(Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the two critical values. (Round to three or more decimal places.) and (e) Can we reject the claim…
Based on their records, a hospital claims that the proportion, p, of full-term babies born weigh over 7 pounds is 45%. A pediatrician who works with several hospitals in the community would like to verify the hopital's claim and investigates. In a random sample of 230 babies born in the community, 113 weighed over 7 pounds. Is there enough evidence to reject the hospital's claim at the 0.10 level of significance?Perform a two-tailed test. Then complete the parts below.Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis H0 and the alternative hypothesis H1 . H0: H1: (b) Determine the type of test statistic to use. ▼(Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the two critical values. (Round to three or more decimal places.) and (e) Can we reject the claim that the…
A researcher used a sample of n = 20 individuals to determine whether there are any preferences among four brands of pizza. Each individual tastes all four brands and selects their favorite brand. If the data are evaluated with a chi-square test for goodness of fit using α = .05, then how large does the chi-square statistic need to be to reject the null hypothesis?
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On a normal weekend, 11% of those attending Mass at a local Catholic church donate over $200 per week, 27% donate between $100 and $200 per week, and the remaining donate less than $100 per week. At Christmas time, a survey of 221 people attending Masses finds that 25% donate over $200, 48% donate between $100 and $200, and the remaining donate less than $100. When testing (at the 10% level of significance) whether the proportions are different at Christmas time than during other weekends, what is the test statistic
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