Claim: Fewer than 98 % of adults have a cell phone . In a reputable poll of 1026 adults , 88% said that they have a cell phone . Find the value of the test statistic . The value of the test statistic is _ ( round to two decimal places as needed )
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Claim: Fewer than 98 % of adults have a cell phone . In a reputable poll of 1026 adults , 88% said that they have a cell phone . Find the value of the test statistic .
The value of the test statistic is _ ( round to two decimal places as needed )
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- Claim: Most adults would erase all of their personal information online if they could. A software firm survey of 682randomly selected adults showed that 55% of them would erase all of their personal information online if they could. Find the value of the test statistic.Find the margin of error and 95% confidence interval for the survey result described. Using a sample consisting of 800adults, a poll found that "two-fifths (40%) of adults say they oppose laws allowing businesses to refuse service to LGBT persons because of [business owners'] religious objections." What is the margin of error and confidence interval for this poll? Does the 40% represent people who favor or oppose the rights of LGBT people in this case? Explain. Margin of error= ?% (Type an integer or decimal rounded to one decimal place as needed.) The confidence interval is from ?% to ?%. (Type integers or decimals rounded to one decimal place as needed.)According to Facebook.com, the mean number of community pages, groups, and events that users are connected to is greater than 75. A random sample of 60 Facebook users showed a mean of 84 connections to community pages, groups, and events. Assume σ = 41 . Using a complete test of hypothesis with α = 0.05 , is there enough evidence to support a claim made that the mean number of connections to community pages, groups, and events is greater than 75? Use the steps for a test of hypothesis.
- Women athletes at the University of Colorado, Boulder, have a long-term graduation rate of 67%. Over the past several years, a random sample of 38 women athletes at the school showed that 21 eventually graduated. Does this indicate that the population proportion of women athletes who graduate from the University of Colorado, Boulder, is now less than 67%? Use α = 0.05 level of significance to test.Claim: Most adults would not erase all of their personal information online if they could. A software firm survey of 630 randomly selected adults showed that 0.8% of them would erase all of their personal information online if they could. Make a subjective estimate to decide whether the results are significantly low or significantly high, then state a conclusion about the original claim.Women athletes at a certain university have a long-term graduation rate of 67%.Over the past several years, a random sample of 36 woman athletes at the school showed that 21 eventually graduated. Does this indicate that the population proportion of women athletes who graduate from the university is now less than 67%? Use a 10% level of significance
- Claim: Most adults would erase all of their personal information online if they could. A software firm survey of 697 randomly selected adults showed that 55% of themwould erase all of their personal information online if they could.Find the value of the test statistic. Round to two decimal places as needeClaim: Most adults would erase all of their personal information online if they could. A software firm survey of 676 randomly selected adults showed that 65% of them would erase all of their personal information online if they could. Find the value of the test statistic.(5) In a recent year, some professional baseball player complained that umpires were calling more strikes than the rate of 61% called the previous year. At one point in the season, umpire Dan Morrison called strikes in 2231 of 3581 pitches (based on data from USA Today. Use a 0.10 significant level to test the claim that Morrison's strike rate is higher than 61%. (6) A researching team conduct a survey, where out of 76 Americans surveyed, only 2 had seen or sensed the presence of an angel. Test the claim that 13% of Americans have seen or sensed the presence of an angel. Use αα=0.05.
- Claim: Most adults would erase all of their personal information online if they could. A software firm survey of 567 randomly selected adults showed that 62% of them would erase all of their personal information online if they could. Find the value of the test statistic.Researchers studying the spread of an insect called the hemlock woolly adelgid find that the bugs have infested 23% of a random sample of 345 hemlock trees in the study area. What's a 99% confidence interval for the population proportion of infested hemlock trees in the study area?Claim: Fewer than 9292% of adults have a cell phone. In a reputable poll of 10151015 adults, 8282% said that they have a cell phone. Find the value of the test statistic. The value of the test statistic is