A reputable polling company reports the results of an opinion poll on a recent news article A social media channel conducts the same oninion poll with its members The
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- What is meant by the sample space of an experiment?What is a sample space?. Suppose that the second researcher conducted his survey by choosing 40 patients he knew. What sampling method would that researcher have used? What concerns would you have about this data set, based upon the data collection method?
- A manager at e-Bay wants to determine the current percentage of U.S.adults who now use the internet. How many adults should be surveyedin order to be 95% confident that the sample percentage is in error by nomore than three percentage points? From a recent Pew Research Centerpoll, 73% of U.S. adults were found to use the web.If the Pew poll wasn’t available, how many adults should be surveyed?If a survey of a movie shows that 50% of all people who like the movie, enjoyed the official movie soundtrack too. If a total of 3850 people were asked, find the data of the survey. What is the sample size?If we wanted a random sample of students in a cafeteria, why couldn't we just take the students who order coke with their lunch?
- Phineas Phillips, from Philadelphia, has a fascination with fun phone facts. But Phineas has furrowed his brow because his cousin Felix (from Florida) claims to have a phone fact that Phineas is not familiar with. His cousin claims that the percentage of iPhone users in Canada is different than it is in the United States. Phineas knows (for a fact) that the percentage of smart phone users in the US that prefer iPhones is 45%. A random sample of 400 Canadian smart phone users indicates that 160 of them prefer iPhones. Can Phineas conclude, at a 10% level of significance that the percent of iPhone users in the US is different than it is in Canada? What is the null hypothesis? What is the alternate hypothesis? Is this a left tail, right tail, or two tailed test? What is the value of the test statistic? What is your conclusion for the hypothesis test?For the survey method to be valid, a representative sample of peoplemust be polled. T or F?An entertainment company surveyed 360 elementary school children and found that 153 of them were above grade-level readers. Find the standard error for the sample proportion of elementary school children who were above grade-level readers.
- The investment firm Brown & Johnson reported that 52.7% of 300 randomly selected American households owned stocks. Does this result provide sufficient sample evidence to indicate that a majority of households in America own stocks? Use a=0.05 Please no excel. I want to know how to do the work.On election day, a local TV news organization stayed at three polling locations in Fairfield county and asked voters whether they voted for candidate A in the election for the US Senate seat. The ’yes’ responses they got were 520 out of 945, 475 out of 865, and 485 out of 980 in the three different locations. They aggregated the sample data into 1480 out of 2790 and after the 8pm close of the election reported their sample results to viewers. a) Go through the steps of a significance test to determine whether or not candidate A won the election. b) Based on the above sample data, at 8:01pm the news organization reported their estimate of the percentage of votes candidate A received and the margin of error of their poll. Calculate these numbers. They then aired their prediction that candidate A won the election. Discuss any concerns you have with their decision to report their prediction.