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- A study by a reputable research group captured multitasking activities of adults who use different devices while watching TV. The study reported that 320 of 442 (72%) smartphone users sampled, 192 of 350 (55%) computer users sampled, and 139 of 260 (53%)tablet users sampled used their device to check social media unrelated to the video content while watching TV. Complete parts (a) through (c) below. a. Is there evidence of a significant difference among the smartphone, computer, and tablet users with respect to the proportion who use their device to check social media unrelated to the video content while watching TV? (Use α=0.10.) Your answer is correct. The test statistic is χ2STAT=35.860 The critical value for α=0.10 Please help and explain how to achieve critical valueAn industrial psychologist hired by a leading accounting firm wanted to know if the average number of hours worked per week at the firm was significantly different from the national average of 52 hours for accountants. The industrial psychologist randomly sampled n=16 people from different divisions within the firm, and calculated the average number of hours they worked per week over a three-month period. The dependent variable in this study is the number of hours worked per week. The data he obtained were: 54, 48, 68, 53, 60, 45, 57, 62, 71, 60, 55, 63, 68, 64, 56, 60A business magazine mailed a questionnaire to the treasurers of all of the Top 400 most profitable companies, and received responses from 22% of them. Those responding reported that they did not find that such surveys intruded significantly on their workday. What is the population and sample? The sample is The population is 1. the 22% (88) of the treasurers who responded 2. the 78% (412) of the treasurers who did not respond 3. all treasurers of all companies 4. treasurers of the Top 400 most profitable companies 5. all profitable companies 6. The business magazine 7. all people 8. the proportion of those responding that said they did not find that such surveys intruded significantly on their workday.
- A golf progolf pro wanted to compare two types of golf clubsgolf clubs. One type is graphite dash shaftedgraphite-shafted and the other is steel dash shaftedsteel-shafted. It is a common belief that graphite shafts give more distancegraphite shafts give more distance. This belief is tested by having 10 golfers hit one ball with each type of club and thenhaving 10 golfers hit one ball with each type of club and then determining the distance that the ball traveled.determining the distance that the ball traveled. A coin flip was used to determine which type of club each player would hit with firstclub each player would hit with first. Results indicated that there was no difference in the two types of clubclub. Complete parts (a) through (f) below.(a) What type of experimental design is this? Randomized block design Completely randomized design Matched-pairs design Case-control study (b) What is the response variable in this study? The golfersgolfers The distancedistance The types…A college president wanted to know how 10-year-after-graduation salaries for aca- demic majors (English, psychology, math, etc.) compared to salaries for career-oriented majors (business, engineering, computer science, etc.). She matched 84 academic majors at her college with 84 career-oriented majors on the basis of SAT scores and GPA. She found MAcademic = $59,250, MCareer =$61,000, sD = 9,500. Use an alpha of .05 and a two-tailed test to determine if there is a difference in salaries.The owner of a chain of mini-markets has two stores, Store 1 and Store 2, in one city. She recently added a breakfast station in Store 1 and wants to determine if the mean daily sales of Store 1 is greater than the mean daily sales of Store 2. After choosing 12 days at random, she records the sales (in dollars) at Store 1 for these days. Then, she records the sales at Store 2 for these same days. The data and the differences (Store 1 minus Store 2) are shown in the table below. Day 1 2 3 4 5 6 7 8. 9. 10 11 12 Store 1 951 547 437 682 547 729 488 776 461 815 859 518 Store 2 989 599 500 680 451 528 452 741 446 758 960. 421 Difference (Store 1 − Store 2) −38 −52 63 2 96 201. 36 35 15 57 −101 97 Send data to calculator Send data to Excel (a)Are the two samples of daily sales amounts independent or paired…
- The number of destination weddings has skyrocketed in recent years. For example, many couples are opting to have their weddings in the Carribean. A recent advertisement recently stated that the cost of a Carribean wedding was less that $30,000. Here is a sample of 8 weddings ($28,500) ($29,500) ($29,900) ($30,200) ($29,200) ($30,400) ($29,000) ($28,900). At the 0.05 significance level, is it reasonable to conclude the mean wedding cost is less than $30,000 as advertised? State the null and alternative hypothesis. Use a 0.05 level of significance (round to 3 decimal places). State the decision rule for 0.05 significance level (round to 3 decimal places). Compute the value of the test statistic (round to 3 decimal places).Basketball players can take shots worth 333 points, 222 points, or 111 point. A scout is assessing two players—Tabitha and Lauren—who play for different teams in different leagues. The scout wonders if they have similar or different shot selections. They take a random sample of Tabitha's games and a separate random sample of Lauren's games. They tally how many of each type of shot the players attempted in those games. Here is a summary and the results of a chi-square test: Chi-square test: Shot vs. player Tabitha Lauren 333-point 888 121212 Expected 10.3410.3410, point, 34 9.669.669, point, 66 222-point 404040 373737 Expected 39.8339.8339, point, 83 37.1737.1737, point, 17 111-point 121212 777 Expected 9.839.839, point, 83 9.179.179, point, 17 �2=2.097, DF=2, P-value=0.350χ2=2.097, DF=2, P-value=0.350\chi, squared, equals, 2, point, 097, comma, start text, space, D, F, end text, equals, 2, comma, start text, space, P, negative, v, a, l, u, e, end text,…I need help with 2, 3 and 6.
- Ms. Fit investigates whether children exhibit a higher number of prosocial acts after watching a 30-minute cartoon containing multiple prosocial acts in comparison to watching a 30-minute educational cartoon. Before watching the cartoon, children were matched on empathy (as rated by one of their parents) and then one of each pair was assigned to either the prosocial cartoon or the educational cartoon. The number of prosocial acts for the children was analyzed and resulted in the output below. Write a directional alternative hypothesis. Identify the IV, its levels, and its scale of measurement. Identify the DV and its scale of measurement. Identify one limitation in the design of this specific study (not just this type of design). Explain why it is a limitation and suggest how a future study could avoid it. What specific procedures should the research have followed to ensure that the study is ethical? Explain your answer.15 wheelchair users were randomly assigned to three groups with 5 in each group. These participants navigated in virtual-reality settings. Group 1 participants were in the virtual-reality setting (a building) as wheelchair users. Group 2 participants were in the virtual-reality setting in a wheelchair pushed by a walking person. Group 3 participants walked without aid in the virtual-reality setting. Joan measured the time each participant needed to complete the navigation of the virtual-reality setting. What is the independent variable(s)?A college president wanted to know how 10-year-after-graduation salaries for academic majors (English, psychology, math, etc.) compared to salaries for careeroriented majors (business, engineering, computer science, etc.). She matched 84 academic majors at her college with 84 career-oriented majors on the basis of SAT scores and GPA. She found MAcademic = $59,250, MCareer =$61,000, sD = 9,500. Use an alpha of .05 and a two-tailed test to determine if there is a difference in salaries.
