34. Reporting cheating What proportion of studentsare willing to report cheating by other students? Astudent project put this question to an SRS of 172undergraduates at a large university: “You witnesstwo students cheating on a quiz. Do you go to theprofessor?" Only 19 answered “Yes."12(a) Identify the population and parameter of interest.(b) Check conditions for constructing a confidenceinterval for the parameter.(c) Construct a 99% confidence interval for p. Showyour method.(d) Interpret the interval in context.

Answered: Image /qna-images/answer/5f714cec-608a-46d1-8f63-6f65403939a1.jpg

Answered: 34. Reporting cheating What proportion…

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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Part 1 is completed, I just need help with Part 2. Part 2 is “95% confidence interval for proportion of Male Online College Students.”
Need the test statistic & p value. & confidence interval. Thankyou.
7. A recent survey of 500 women indicated that 29% of women over age 55 in the study were widows. Construct a 90% confidence interval for the true proportion of women over the age of 55 who are widows based on this survey.
Suppose we wanted to estimate the average amount of sleep (in hours) a college student gets a night. Which sample size of students would have a confidence interval with a smaller width? Group of answer choices A sample size of 50 students. A sample size of 500 students.
According to a Field Poll, 254 out of 409 of California adults feel that "education and our schools" is one of the top issues facing California. We wish to construct a 90% confidence interval for the true proportion of California adults who feel that education and the schools is one of the top issues facing California. The error bound is ___________ rounded to 4 decimal places.
question #2 2. A recent survey showed that from a sample of 500 packages delivered by a Postal Service,480 were delivered on time. a) Construct a 95% confidence interval for the proportion of all packages that are delivered on time by the Postal Service. b) The manager of the Postal Services claims that 98 percent of their mail are delivered on time. Test at the 1% significance level to determine whether the true proportion is less than 98 percent.
A study of 420,016 cell phone users found that 130 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 0.0318% for those not using cell phones. Complete parts (a) and (b) a)use the sample data to construct a 95% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system. ____% < p < ____% 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? a) Yes, because 0.0318% is not included in the confidence interval b) Yes, because 0.0318% is included in the confidence interval c) No, because 0.0318% is not included in the confidence interval d) No, because 0.0318% is included in the confidence interval
A pharmaceutical company is running tests to see how well its new drug lowers cholesterol. Fourteen adults volunteer to participate in the study. The total cholesterol level of each participant (in mg/dL) is recorded once at the start of the study and then again after three months of taking the drug. The results are given in the following table. Construct a 90% confidence interval for the true mean difference between the cholesterol levels for people who take the new drug. Let Population 1 be the initial cholesterol level and Population 2 be the cholesterol level after three months. Round the endpoints of the interval to one decimal place, if necessary. Total Cholesterol Levels (in mg/dL) Initial Level Level after Three Months 190 192 230 207 206 182 229 199 224 181 195 209 226 214 190 189 224 196 219 206 185 195 208 204 194 198 225 216 Please highlight the answer
A sample of freshman takes a reading comprehension test and their scores are summarized below. Sample scores: 16, 8, 8, 6, 9, 11, 13, 9, 10 a. if the mean for the general population on this test is m=12, can you conclude that this sample is significantly different from the population. Test with a=.05 b. Calculate a 90% confidence interval around your mean.
In a statistics activity, students are asked to determine the proportion of times that a spinning penny will land with tails up. The students are instructed to spin the penny 10 times and record the number of times the penny lands tails up. For one student, it lands tails side up six times. The student will construct a 90% confidence interval for the true proportion of tails up. Are the conditions for inference met? Yes, the conditions for inference are met. No, the 10% condition is not met. No, the randomness condition is not met. No, the Large Counts Condition is not met.
4.
CorpPlus is a large corporation with many employees. You work for the human resources department of CorpPlus and want to estimate the population proportion of all employees who say the corporation is a great place to work. So, you will survey a random sample of 95 employees from CorpPlus and ask them whether they think the corporation is a great place to work. Follow the steps below to construct a 99% confidence interval for the population proportion of all employees who say the corporation is a great place to work. (If necessary, consult a list of formulas.) (a) Click on "Take Sample" to see the results from the random sample. Take Sample Sample size: 0 Point estimate: 0 Critical value: 0 Compute 0.000 Says the corporation is a great place to work Enter the values of the sample size, the point estimate of the population proportion, and the critical value you need for your 99% confidence interval. (Choose the correct critical value from the table of critical values provided.) When you…

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