Scenario: Terry Teacher suspects that kindergarten class sizes in Alameda county are larger than average. According to the California Department of Education, the average kindergarten class size in California is 21.9. For a random sample of 36 Alameda County kindergarten classes, the average class size was 23 with a standard deviation of two. Run a test to assess Terry Teacher's hypothesis at the a=.05 level. Question: Given the p-value you calculated, which of the following is a correct conclusion for this test? (select all that apply) There is support for the alternative hypothesis Because p < , we can reject the null hypothesis Because p > we fail to reject the null hypothesis There is no support for the alternative hypothesis

Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the difference between proportions of men and women who own smartphones. Assume that you want 95% confidence that your error is no more than 0.02. A Click the icon to view the discussion of sample size. The sample should include men and women. (Type whole numbers.) Sample size discussion The sample size needed to estimate the difference between two population proportions to within a margin of error E with a confidence level of 1-a can be found by using the following expression: P191 P292 E=Za/2 n1 n2 Replace n, and n2 by n in the preceding formula (assuming that both samples have the same size) and replace each of p,, 9,, P2, and q2 by 0.5 (because their values are not known). Solving for n results in this expression: a/2 n = 2E? Print Done

The first picture is the question and the second is the ones that I need help with. thanks!

yansons lunch to go wants to know if there is a difference in customer satisfaction at any of the 3 locations. 500 customers were surveyed at each of the three locations, and the results of the survey is highlighted below dissatisfied one is 25 two is 10 and 3 is 40 satisfied one is 475 two is. 490 and three is 460. and totals are all 500. what is the correct degrees of freedom needed if you were to calculate X2 test statistic ?