What hypothesis testing procedure should you use to answer these questions? 0.05 if it isn't Assume all samples are simple random samples, and assume x = specified. A state-by-state survey found that the proportion of adults who are smokers in Alabama and Missouri was 24.7% and 28.7%, respectively. Each has a sample size of 2000. At x = 0.01, can you support the claim that the proportion of smokers is lower in Alabama than in Missouri? One sample z-test for the population mean. Two sample z-test for the population means. One sample z-test for proportions. Two sample z-test for proportions. One sample t-test for the population mean.

If a researcher failed to use a random sample, how would this affect the research conclusion?   If a researcher failed to use random assignment, how would this affect the research results?

The student body at many community colleges is considered a "commuter population". The following question was asked of the Student Affairs Office at one such college: "How far (one way) does the average community college student commute to college daily?" The office answered: "20.0 miles or less." The inquirer was not convinced of the truth of this and decided to test the statement. She took a random sample of 55 students and found a mean commuting distance of 21.5 miles. Test the statement made by the Students affairs Office at a significance level of 0.01. Assume that the population standard deviation is known to be 5.1 miles. Use the P-Value Method of Testing.In your work space below, you will need to have -1.  The null hypothesis, Ho 2.  The alternative hypothesis, H13.  The test statistic 4.  The type of test(left, right, two-tailed) and the p-value 5.  The decision to accept Ho or reject Ho

Please see below. Only given one attempt at this.  People who sustain a concussion or a traumatic brain injury (TBI) are likely to experience sleep problems. Do these problems persist over time? Researchers recruited a sample of 31 patients who had their first TBI 18 months earlier and a control group of 42 otherwise similar individuals without prior TBIs. They compared sleep duration per 24 hours for the 2 groups. Which test is most appropriate for this scenario? A 2-sample test for means B 1-sample z-test for proportions C 2-sample test for proportions D matched-pairs  E 1-sample t-test for means