According to a Pew Research Center study, in May 2011, 33% of all American adults had asmart phone (one which the user can use to read email and surf the Internet). Acommunications professor at a university believes this percentage is higher among communitycollege students. She selects 358 community college students at random and finds that 141 ofthem have a smart phone. In testing the hypotheses:Ho: p = 0.33 versusHa: p > 0.33Do the hypothesis test. Use a level of significance of a = 0.05;Use the unrounded values in Excel to find the answers for #3 and #4.1. This is an example of ahypothesis test.2. Find the standard error.3. Find the z value.4. Find the p-value. -5. The communication professor shouldthe null hypothesis.

In a research study, 33% of American adults had a smartphone. The number of community college…

Answered: According to a Pew Research Center…

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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Similar questions

In a survey of 32 students at a local high school, 17 support changing the schools mascot. Find the 90% confidence interval for the true population proportion of students who support changing the schools mascot.
According to a report, 52.3% of murders are committed with a firearm. (a) If 100 murders are randomly selected, how many would we expect to be committed with a firearm? (b) Would it be unusual to observe 56 murders by firearm in a random sample of 100 murders? Why? (a) We would expect to be committed with a firearm. (b) Choose the correct answer below. O A. No, because 56 is between u - 20 and u + 20. O B. Yes, because 56 is greater than + 20. C. No, because 56 is greater than u + 20. D. No, because 56 is less than u - 20. O E. Yes, because 56 is between u -2o and + 20.
2. You are interested in researching whether the college experience leads to differences in attitudes toward traditional gender roles. Comparing random samples of freshman and seniors at the same university, you find the following: Traditional gender roles ranges from 7 (“Very traditional”) to 1 (“Very nontraditional”). Is there a significant difference between freshman and seniors in their gender role attitudes? a. State the null and research hypotheses (assume a 2-tailed test). b. Calculate the test statistic. c. What is the p-value? d. What do you conclude?
There is a 75% chance that those who are called will serve on jury duty. If 12 people are called for jury duty, what is the probabilty that none of the people will serve on the jury?
In a survey of 6000 high school students, 3230 read books during the summer break. Using these sample statistics, find a 99% confidence interval for the proportion p of all high school students that read books during the summer break.
In a poll, 1100 adults in Nantucket were asked about their computer gaming habits. One finding was that 43% of respondents never computer game. Find and interpret a 95% confidence interval for the proportion of all adults in Nantucket who never play computer games
USA Today ran a report about a UNC poll of 1248 adults from the southern U.S. It was reported that 8% of those surveyed believe that Elvis Presley still lives. The article began with the claim that "almost 1 out of 10" Southerners still thinks Elvis is alive. At the 0.01 significance level, test the claim that the true percentage is 10%.
A political scientist claims that 38% of first-year college students characterize themselves as being “moderate” or “middle of the road” as far as their political affiliation is concerned. Believing this claimed value is too high, you survey a random sample of 400 first-year college students and find that 120 characterize themselves as being “moderate” or “middle of the road.” Based on this information, what will the test statistic be? Choose the answer below that is closest to what you calculate, and try not to do a lot of rounding until you get to the very end of your calculations. 1. -0.3 2. -1.2 3. -2.6 4. -3.3 5. None of the other answer options are correct because the test statistic should be positive, not negative.
According to a report published by the Pew Research Center in February 2010, 61% of Millennials (people born between 1981 and 1996) think that their generation has a unique and distinctive identity (N = 527). What is the 95% confidence interval to estimate the percentage of Millennials who believe that their generation has a distinctive identity as compared with the other generations (Generation X, Baby Boomers, or the Silent Generation)?
When Mendel conducted his famous genetics experiments with peas, one sample of offspring consisted of 428 green peas and 152 yellow peas. 3. a. Find a 99% confidence interval estimate of the percentage of yellow peas.
In a survey, 545 college students are randomly selected and asked whether or not they own a car. Of those surveyed, it is found that 210 own a car. Use this data to find a 99% confidence interval for the true proportion of all college students who own a car.
6.41 Open source textbook: A professor using an open source introductory statistics book predicts that 60% of the students will purchase a hard copy of the book, 25% will print it out from the web, and 15% will read it online. At the end of the semester he asks his students to complete a survey where they indicate what format of the book they used. Of the 126 students, 71 said they bought a hard copy of the book, 30 said they printed it out from the web, and 25 said they read it online.(a) State the hypotheses for testing if the professor's predictions were inaccurate. Ho: pBuy = .6, pPrint=.25, pOnline=.15Ha: at least one of the claimed probabilities is different Ho: pBuy = .6, pPrint=.25, pOnline=.15Ha: at least one of the claimed probabilities is zero Ho: pBuy = .6, pPrint=.25, pOnline=.15Ha: all of the claimed probabilities are different Correct (b) How many students did the professor expect to buy the book, print the book, and read the book exclusively online? (please do not…

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