A news release from Intel, “Intel’s Security International Internet of Things Smart Home Survey Shows Many Respondents Sharing Personal Data for Money” (March 30, 2016, newsroom.intel.com /news-releases/intel-securitys-international -internet-of-things-smart-home-survey/, retrieved September 25, 2016), described a survey conducted in 2015. The news release states “A total of 9,000 consumers were interviewed globally, including 2,500 from the United States, 1,000 from the United Kingdom, 1,000 from France, 1,000 from Germany, 1,000 from Brazil, 1,000 from India, 500 from Canada, 500 from Mexico and 500 from Australia.” Among the findings from the survey were that 54% of the respondents worldwide would be willing to share personal data collected from devices in their homes with companies in exchange for money.
Do you think that the study described was an observational study or an experiment?
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Chapter 2 Solutions
Introduction To Statistics And Data Analysis
- The union of two sets is defined as a set of elements that are present in at least one of the sets. How is this similar to the definition used for the union of two events from a probability model? How is it different?arrow_forwardA Pew Research study conducted in 2017 found that approximately 75% of Americans believe that robots and computers might one day do many of the jobs currently done by people (Pew Research website, http://www.pewinternet.org/2017/10/04/americans-attitudes-toward-a-future-in-which-robots-and-computers-can-do-many-human-jobs/). Suppose we have the following data collected from nurses, tax auditors, and fast-food workers in which a higher score means the person feels his or her job is more likely to be automated.arrow_forwardA Pew Research study conducted in 2017 found that approximately 75% of Americans believe that robots and computers might one day do many of the jobs currently done by people (Pew Research website, http://www.pewinternet.org/2017/10/04/americans-attitudes-toward-a-future-in-which-robots-and-computers-can-do-many-human-jobs/). Suppose we have the following data collected from nurses, tax auditors, and fast-food workers in which a higher score means the person feels his or her job is more likely to be automated. Tax Fast-Food Nurse Auditor Worker 3 5 5 4 6 7 4 5 4 5 4 5 4 7 6 4 5 6 5 6 6 4 5 8 a. Use x=0.05 to test for differences in the belief that a person's job is likely to be automated for the three professions. F= ______ (to 2 decimals) The p-value is ______ What is your conclusion? We _______ the…arrow_forward
- A manufacturer inspects 400 personal video players and finds that 399 of them have no defects. The manufacturer sent a shipment of 1,600 personal video players to a distributor. Predict the number of players in the shipment that are likely to have no defects.arrow_forwardA nationwide job recruiting firm wants to compare the annual incomes for childcare workers in New York and Illinois. Due to recent trends in the childcare industry, the firm suspects that the that the mean annual income of childcare workers in the state of New York is greater than the mean annual income of childcare workers in Illinois. To see if this is true, the firm selected a random sample of 20 childcare workers from New York and an independent random sample of 20 childcare workers from Illinois and asked them to report their mean annual income. The data obtained were as follows. Annual income in dollars New York 46686 , 34979 , 47325 , 48892 , 51128 , 56792 , 47785 , 48995 , 57301 , 55176 , 48002 , 45718 , 50351 , 58527 , 47067 , 53699 , 54361 , 49727 , 36426 , 50870 Illinois 48009 , 46871 , 42774 , 49790 , 43163 , 45401 , 41068 , 50300 , 47064 , 42003 , 47775 , 41917…arrow_forward(a) Department of Statistics Malaysia (DOSM) has reported that 21% of loans granted by conventional bank were for home mortgages, 39% were for automobile purchases, 20% were for credit card and other unsecured loans, 12% were for real estate other than home loans, and 8% were for other miscellaneous needs. To see if XYZ Bank customers had similar needs, the bank manager surveyed a random sample of 100 loans and found that 25 were for home mortgages, 44 for automobile purchases, 19 for credit card and unsecured loans, 8 for real estate other than home loans, and 4 for miscellaneous needs. At ? = 0.05, is the distribution the same as reported in the newspaper?arrow_forward
- A poll of 176,903 American adults, aged 18 and older, was conducted January 2 to December 30, 2014, as part of the Gallup-Healthways Well-Being Index survey. Gallup and Healthways have been “tracking Americans’ life evaluations daily” since 2008. According to this poll, in 2014, Americans’ outlook on life was the best in seven years, as 54.1% “rated their lives highly enough to be considered thriving,” 42.1% said they were struggling, and 3.8% mentioned that they were suffering. As mentioned in the chart, the margin of sampling error was ±1%.arrow_forwardFor several decades, it was a common practice in Southern California for houses to be built with pools in the backyard (as any airplane flight which ends at a Southern California airport will reveal). Now, however, that practice may be changing, possibly because of the recent demand for landscaped homes, which experts believe help reduce pollution. A recent study examined a random sample of 127 houses built in Southern California between 1950 and 1985 and an independent, random sample of 71 houses built in Southern California from 1992 to the present. The sample of houses built in 1950 – 1985 contained 43 houses with pools, and the sample of houses built from 1992 – present contained 23 houses with pools. Based on this survey, can we conclude, at the 0.05 level of significance, that the proportion p1 of all Southern California houses built in 1950 – 1985 that were built with pools is greater than the proportion p2 of all Southern California houses built from 1992 – present that were…arrow_forwardFor several decades, it was a common practice in Southern California for houses to be built with pools in the backyard (as any airplane flight which ends at a Southern California airport will reveal). Now, however, that practice may be changing, possibly because of the recent demand for landscaped homes, which experts believe help reduce pollution. A recent study examined a random sample of 153 houses built in Southern California between 1950 and 1985 and an independent, random sample of 75 houses built in Southern California from 1992 to the present. The sample of houses built in 1950 – 1985 contained 73 houses with pools, and the sample of houses built from 1992 – present contained 30 houses with pools. Based on this survey, can we conclude, at the 0.01 level of significance, that the proportion p1 of all Southern California houses built in 1950 – 1985 that were built with pools is greater than the proportion p2 of all Southern California houses built from…arrow_forward
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