According to a Pew Research Center study, in May 2011, 43% of all American adults had...

According to a Pew Research Center study, in May 2011, 43% of all American adults had a smart phone (one which the user can use to read email and surf the Internet). A communications professor at a university believes this percentage is higher among community college students. She selects 355 community college students at random and finds that 162 of them have a smart phone. Then in testing the hypotheses: H 0 : p = 0.43 versus H a : p > 0.43, what is the test statistic? z = . (Please round your answer to two decimal places.)

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orchestra answered 2 years ago

According to a Pew Research Center study, in May 2011, 39% of all American adults had...

According to a Pew Research Center study, in May 2011, 39% of all American adults had a smartphone (one which the user can use to read email and surf the Internet). A communications professor at a university believes this percentage is higher among community college students. She selects 342 community college students at random and finds that 139 of them have a smartphone. Then in testing the hypotheses: H0 : p = 0.39 versus Ha : p > 0.39 What...

5. According to a Pew Research Center nationwide telephone survey of American adults conducted by phone...

5. According to a Pew Research Center nationwide telephone survey of American adults conducted by phone between March 15 and April 24, 2011, 75% of adults said that college education has become too expensive for most people and they cannot afford it (Time, May 30, 2011). Suppose that this result is true for the 2011 population of American adults. In a recent poll of 1600 American adults, 1160 said that college education has become too expensive for most people and...

According to a Pew Research Center nationwide telephone survey of adults conducted between March 15 and...

According to a Pew Research Center nationwide telephone survey of adults conducted between March 15 and April 24, 2011, 55% of college graduates said that college education prepared them for a job (Time, May 30, 2011). Suppose this result was true of all college graduates at that time. In a recent sample of 2000 college graduates, 59% said that college education prepared them for a job. Is there significant evidence at a 5% significance level to conclude that the current...

According to a study done by Pew Research Center, 210 out of 500 adult Americans believe...

According to a study done by Pew Research Center, 210 out of 500 adult Americans believe that marriage is now obsolete. a. Find the mean and standard deviation of the sampling distribution of ?̂; the sample proportion of adult Americans who believe marriage is obsolete. b. In a random sample of 500 adult Americans, what is the probability that less than 35% believe marriage is obsolete? c. What is the probability that in a random sample of 500 adult Americans...

According to the Pew Research Center, 20% of Americans have not read a book in the...

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In a recent survey conducted by the Pew Research Center, a random sample of adults 18 years of age or older living in the continental united states was asked their reaction to the word socialism. In addition, the individuals were asked to disclose which political party they most associate with. Results of the survey are given in the table. Democrat Independent Republican Positive 220 144 62 Negative 279 410 351 a) Explain why this data should be analyzed by the...

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The Pew Research Center took a random sample of 2928 adults in the United States in...

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The Pew Research Center recently conducted a survey of 1007 U.S. adults and found that 85%...

The Pew Research Center recently conducted a survey of 1007 U.S. adults and found that 85% of those surveyed know what Twitter is. Using the survey results construct a 95% confidence interval estimate of the percentage of all adults who know what Twitter is. Round the percentages to the first decimal place. (c) Explain why it would or would not be okay for a newspaper to make this statement: “Based on results from a recent survey, more than 3 out...

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