In each of Exercises, we have provided the numbers of successes and the sample sizes for independent simple random samples from two populations. In each case, do the following tasks. a.Determine the sample proportions.b.Decide whether using the two-proportions z-procedures is appropriate. If so, also do parts (c) and (d).c.Use the two-proportions z-test to conduct the required hypothesis test.d.Use the two-proportions z-interval procedure to find the specified confidence interval. x1 = 18, n1 = 40, x2 = 30, n2 = 40; left-tailed test, a = 0.10; 80% confidence interval

Homser Lake, Oregon, has an Atlantic salmon catch-and-release program that has been very successful. The average fisherman's catch has been ? = 9.0 Atlantic salmon per day. Suppose that a new quota system restricting the number of fishermen has been put into effect this season. A random sample of fishermen gave the following catches per day:12 6 11 12 5 0 27 8 7 6 3 12 12 I need help with (b) and the value of the sample test statistic

For each scenario listed on the left, determine whether the scenario represents an Indepenent Samples or Matched pairs situation by placing the appropriate letter in the box provided.   -ab Comparing the number of speeding tickets received by men to the number received by women -ab Comparing pain levels before and after treatment with magnetic therapy -ab Comparing pre-test scores before training to post-test scores -ab Comparing pain levels of a group receiving a placebo to a group receiving a medicine   Matched Pairs Independent Samples

Can you do c, d, e?

In studying the responses to questions on a multiple-choice test, the following sample data are obtained. At the α=0.05 significance level, test the claim that the responses occur with the same frequency. H0 : The responses to the questions occur with the same frequency. H1 : The responses to the questions do not occur with the same frequency. Response ObservedFrequency ExpectedFrequency  (O−E)2E  A 18     B 7     C 6     D 20     E 18     What is the χ2 test-statistic for this data? Round to four decimal places.χ2= _____________ What is the p -value? Round to four decimal places. p -value=__________

In each of Exercises, we have provided the numbers of successes and the sample sizes for independent simple random samples from two populations. In each case, do the following tasks. a.Determine the sample proportions.b.Decide whether using the two-proportions z-procedures is appropriate. If so, also do parts (c) and (d).c.Use the two-proportions z-test to conduct the required hypothesis test.d.Use the two-proportions z-interval procedure to find the specified confidence interval. x1 = 30, n1 = 80, x2 = 15, n2 = 20; two-tailed test, a = 0.05; 95% confidence interval

A researchers is interested in the amount of sleep an individual receives after consuming a sleeping aid (Melatonin, Valerian root, and Placebo). The researcher randomly selects individuals into either group. However, some individuals drop out of the study which results in unequal sample sizes. Melatonin: n=6, M=14, T=84, SS=60 Valerian: n=10, M=13, T=130, SS=90 Placebo: n=4, M=9, T=36, SS=37 N=20, G=250,  x2=3377   Calculate the F-ratio

Conduct a test at the a = 0.01 level of significance by determining (a) the null and alternative hypotheses, (b) the test statistic, and (c) the P-value. Assume the samples were obtained independently from a large population using simple random sampling. Test whether p, > P2. The sample data are x, =118, n, = 258, x, = 139, and n, = 314.