test statistic

Identify the sample size from the histogram: 18 16 13 12 10 140 190 220 200 Weghts requency

The 2008 general social survey asked a nationally representative sample of 1324 adult americans to report how many hours of television they watch in a typical day. The resulting data are reported in the following table counts. Describe the shape of the distribution of number of hours of TV watching.

The 2008 general social survey asked a nationally representative sample of 1324 adult americans to report how many hours of television they watch in a typical day. The resulting data are reported in the following table counts. Median number of hours of tv watching per day

Consider these sample​ data: x1=15​, x2=9​, x3=3​, x4=22.   a. Find n.        b. Compute ∑xi.      c.Determine x.       a.n=

Last rating period, the percentages of viewers watching several channels between 11 p.m. and 11:30 p.m. in a major TV market were as follows:  WDUX(News) WWTY(News) WACO(Cheers Reruns) WTJW(News) Others 18% 20% 25% 20% 17%   Suppose that in the current rating period, a survey of 2,000 viewers gives the following frequencies:   WDUX(News) WWTY(News) WACO(Cheers Reruns) WTJW(News) Others 263 442 560 309 426      Click here for the Excel Data File   (a) Show that it is appropriate to carry out a chi-square test using these data.       (b) Determine whether the viewing shares in the current rating period differ from those in the last rating period at the .10 level of significance. (Round your answer to 3 decimal places.)

Determine the sample in this research scenario: Dr. Eglovitch wants to know whether type of exercise, running or yoga, improves post-partum depression. One hundred women are recruited from obstetricians’ offices in the Richmond area.   Group of answer choices A.100 postpartum women whose depression was measured B.Type of exercise C. Postpartum depression D. All postpartum women

A large group of workers is divided into three departments: those who work in special operations, those who work on the main floor, and those who work in management. Strep throat has been going around and a health inspector would like to know if there is a relationship between department and having strep throat. She selects a random sample of 100 workers and classifies each one according to their department and whether they have strep throat. The data are displayed in the table.   The health inspector would like to know if these data provide convincing evidence that the distribution of strep throat status differs across the departments in the population of all workers of this large company. What is the appropriate inference procedure? chi-square test for goodness of fit because the data come from one random sample chi-square test for homogeneity because the data come from independent random samples chi-square test for association/independence because the data come from one random…

Last rating period, the percentages of viewers watching several channels between 11 p.m. and 11:30 p.m. in a major TV market were as follows:   WDUX(News) WWTY(News) WACO(Cheers Reruns) WTJW(News) Others 15% 19% 22% 16% 28%     Suppose that in the current rating period, a survey of 2,000 viewers gives the following frequencies:   WDUX(News) WWTY(News) WACO(Cheers Reruns) WTJW(News) Others 182 536 354 151 777          Click here for the Excel Data File     (a) Show that it is appropriate to carry out a chi-square test using these data.           (b) Determine whether the viewing shares in the current rating period differ from those in the last rating period at the .10 level of significance. (Round your answer to 3 decimal places.)

The Condé Nast Traveler Gold List provides ratings for the top 20 small cruise ships. The data shown below are the scores each ship received based upon the results from Condé Nast Traveler's Annual Readers' Choice Survey. Each score represents the percentage of respondents who rated a ship as excellent or very good on several criteria, including Shore Excursions and Food/Dining. An overall score was also reported and used to rank the ships. The highest ranked ship, the Seabourn Odyssey, has an overall score of 94.4, the highest component of which is 97.8 for Food/Dining. Shore Ship Overall Food/Dining Excursions Seabourn Odyssey 94.4 90.9 97.8 Seabourn Pride 93.0 84.2 96.7 National Geographic Endeavor 92.9 100.0 88.5 Seabourn Sojourn 91.3 94.8 97.1 Paul Gauguin 90.5 87.9 91.2 Seabourn Legend 90.3 82.1 98.8 Seabourn Spirit 90.2 86.3 92.0 Silver Explorer 89.9 92.6 88.9 Silver Spirit 89.4 85.9 90.8 Seven Seas Navigator 89.2 83.3 90.5 Silver Whisperer 89.2 82.0 88.6 National Geographic…