Q1:Let p equal the proportion of drivers who use a seat belt in a country that does not have amandatory seat belt law. It was claimed that p = 0.14. An advertising campaign wasconducted to increase this proportion. Two months after the campaign, y = 104 out of arandom sample ofn = 590 drivers were wearing their seat belts.The null and alternative hypotheses are given by

Given, p = proportion of drivers who use a seat belt in a country that does not have a mandatory…

Answered: Q1:Let p equal the proportion of…

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 study is to be made to estimate the proportion of residents of a certain city and its suburbs who favor the construction of a nuclear power plant near the city. How large a sample is needed if one wishes to be at least 95% confident that the estimate is within 0.08 of the true proportion of residents who favor the construction of the nuclear power plant?
To collect data about the amount of time students spend studying for exams, which of the following methods should a teacher use to lead to a sample that is the most representative of the students in the school? Survey all the students who are in their final year of high school. Survey all students who achieved over 85% on their report card last semester. Survey all the students who play football. Survey all the students in the classes that he or she teaches. Survey 20 randomly selected students from each grade.
It’s assumed that students need to stay awake more to study during finals week. One way to measure this is how much coffee is consumed during Finals week at night. A local coffee house near APU counted the number of cups of coffee sold per hour during Finals week after 6 p.m. We randomly select ten (10) hours of sales records during Finals week and find out that the following number of cups of coffee were consumed: 18, 17, 22, 14, 17, 20, 22, 24, 15, 15 By comparison, the sales records from a previous week were used as a comparison. The following number of cups of coffee were consumed over a seven (7) hour period: 9, 13, 5, 15, 17, 10, 11 a. Determine what is the appropriate statistical procedure, with a brief explanation (one sentence) as to why this is the appropriate procedure. b. State the null hypothesis. c. Execute the proper calculations with the appropriate procedures. d. Present a graph when appropriate of your results. e. Include any appropriate post-hoc tests. f. State…
Suppose you take a sample of 25 Reese's pieces. The proportion of orange is 0.4. What is the p-value when testing the hypothesis that the actual proportion of orange for all Reese's pieces is 0.5? Round to two places.
A study was conducted to see of airbags save lives. The table below lists the results from a simple random sample of front-seat occupants involved in car crashes. Airbag Available No Airbag Available Occupant Fatalities 41 52 Total number of occupants 11,541 9,853 What is the sample proportion of fatalities where there were no airbags available, p2? What is the difference in the two proportions, D? What is the standard error of the difference, SED?
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A study is to be made to estimate the proportion of residents of a certain city and its suburbs who favor the construction of a nuclear power plant near the city. How large a sample is needed if one wishes to be at least 90% confident that the estimate is within 0.03 of the true proportion of residents who favor the construction of the nuclear power plant?
The IRS is interested in estimating the total number of tax accounts who has their own tax returns audited last year. If a random sample of 80 returns showed that 12 were audited, develop a 95% interval estimate for true proportion (population proportion) of tax accounts who had their returns audited last year.
Suppose a one sided test for a proportion resulted in a p-value of 0.06. What would the p-value be if the test were two tail test? Select one: A. It would still be 0.06. B. It would be 0.3. C. It would be 0.12. D. There is no way to calculate this without completely redoing the original test with a new alternative hypothesis.
A publisher reports that 69 % of their readers own a particular make of car. A marketing executive wants to test the claim that the percentage is actually under the reported percentage. A random sample of 200 found that 60% of the readers owned a particular make of car. Is there sufficient evidence at the 0.10 level to support the executive's claim? Step 5 of 7: Identify the value of the level of significance.

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