..... The value of the test statistic is (Round to two decimal places as needed.)
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- How often do you go out dancing? This question was asked by a professional survey group on behalf of the National Arts Survey. A random sample of n1 = 97 single men showed that r1 = 24 went out dancing occasionally. Another random sample of n2 = 93 single women showed that r2 = 18 went out dancing occasionally. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value a small amount and thereby produce a slightly more "conservative" answer.Sleep apnea is a disorder in which you have one or more pauses in breathing or shallow breaths while you sleep. In a cross-sectional study of 390 adults who suffer from sleep apnea, it was found that 273 had gum disease. Note: In the general population, about 17.5% of individuals have gum disease. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). Click here to view the table of critical t-values. 4 (a) What does it mean for this study to be cross-sectional?Find the P-value (to 4 decimals) for a x test with d. f. = 9 and STS x = 1.6 if the test is: a. Left tailed: b. Right tailed: c. Two-tailed: Submit Question
- Explain what Cohen's d and r2 measure when calculated for a t testTime left 0:4 From January to September, the mean number of car accidents per month was 630. From October to December, the mean was 1350 accidents per month. of The mean number of car accidents per month for the whole year was: a) 720 b) 675 c) 690 d) 810 e) 630Caselet 3 To test a subject's ability to estimate sizes, he was shown 10 different objects and was asked to estimate their length or diameter. The object was then measured, and the results were recorded in the table. Is there evidence to say that the person has good estimation ability? Test with level of significance of 0.05. Object Pencil Dinner Plate Book 1 Cell Phone Photograph Toy Belt Clothespin Book 2 Calculator Estimated (Inches) Actual (Inches) 7 9.5 7.5 4 14 3.75 42 2.75 10 3.5 6 10.25 6.75 4.25 15.75 5 41.5 3.75 9.25 4.75
- Can someone please help? Thank you.To compute a student's Grade Point Average (GPA) for a term, the student's grades for each course are weighted by the number of credits for the course. Suppose a student had these grades: 4.0 in a 5 credit Math course 2.5 in a 3 credit Music course 2.7 in a 5 credit Chemistry course 3.3 in a 6 credit Journalism course What is the student's GPA for that term? Round to two decimal places Student's GPA =For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding. A random sample of 5616 physicians in Colorado showed that 3278 provided at least some charity care (i.e., treated poor people at no cost). A USE SALT (a) Let p represent the proportion of all Colorado physicians who provide some charity care. Find a point estimate for p. (Round your answer to four decimal places.) 0.5837 (b) Find a 99% confidence interval for p. (Round your answers to three decimal places.) lower limit 0.0617 upper limit
- How often do you go out dancing? This question was asked by a professional survey group on behalf of the National Arts Survey. A random sample of n1 = 95 single men showed that r1 = 23 went out dancing occasionally. Another random sample of n2 = 92 single women showed that r2 = 19 went out dancing occasionally. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value a small amount and thereby produce a slightly more "conservative" answer. (a) Do these data indicate that the proportion of single men who go out dancing occasionally is higher than the proportion of single women who do so? Use a 5% level of significance. List the assumptions you made in solving this problem. Do you think these assumptions are realistic? What is the level of significance? What is the value of the sample test statistic? (Round your answer to three decimal places.) (b) Compute a 90% confidence…Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long train. The autoratic hopper car loader is set to put 57 tons of coal ints each car. The actual weights of coal loaded d deviation o = 1.1 ton.The value of SSR can never be larger than: Which? SST. 0.0. 1.0. 400. SSE.