You are performing a two-tailed test. If a = .002, find the positive critical value, to three decimal places. You are performing a left-tailed test with test statistic z = - 1.641, find the p-value accurate to 4 decimal places. p-value =You are given the following hypotheses: H0: p = 30 Ha: p : 30 We know that the sample standard deviation is 10 and the sample size is 70. For what sample mean would the p-value be equal to 0.05? Assume that all conditions necessary for inference are satis fied. The sample mean should be at most :] or at least :] (please round each answer to two decimal places) The table summarizes results from pedestrian deaths that were caused by automobile accidents. Pedestrian Deaths Driver Pedestrian Intoxicated? Intoxicated? Yes Yes If two different pedestrian deaths are randomly selected, find the probability that they both involved pedestrians that were intoxicated. Report the answer rounded to four decimal place accuracy. D A CBS News poll involved a nationwide random sample of 651 adults, asked those adults about their party affiliation (Democrat, Republican or none) and their opinion of how the US economy was changing ("getting better," "getting worse" or "about the same"). The results are shown in the table below. better same worse Republican | 38 104 44 Democrat I 12 87 137 none | 21 90 118 If we randomly select one of the adults who participated in this study, compute: (round to four decimal places) Data were collected from a survey given to graduating college seniors on the number of times they had changed majors. From that data, a probability distribution was constructed. The random variable X is defined as the number of times a graduating senior changed majors. It is shown below: a. What is the probability that a randomly selected student changed his or her major at least once? b. What is the probability that a randomly selected student changed his or her major at most twice? c. Given that a randomly selected person did change majors, what is the probability that he or she changed majors more than three times? (Round your answer to three decimal places.) American Airlines' flights from Boston to Dallas are on time 60 96 of the time. Suppose 7 flights are randomly selected, and the number on-time flights is recorded. Round answers to 3 significant figures. The probability that exactly 5 flights are on time is = :] The probability that at most 6 flights are on time is =:] The probability that at least 4 flights are on time is =:] \fSuppose that the value of a stock varies each day from $8.82 to $25.17 with a uniform distribution. Find the upper quartile; 25% of all days the stock is above what value? (Enter your answer to the nearest cent.) 5:] 1 Given the probability density function f(m) = 5 over the interval [2, 5], find the expected value, the mean, the variance and the standard deviation