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- An ANOVA produces an F-ratio with df = 1, 34. Could the data have been analyzed with a t test? What would the degrees of freedom be for a t statistic?Find the right critical value for the F-distribution when a = .05 and DFN = 6 and DFD = 10In a sample of 15 randomly selected high school seniors, the mean score on a standardized test was 1191 and the standard deviation was 164.6. Further research suggests that the population mean score on this test for high school seniors is 1012. Does the t-value for the original sample fall between −t0.99 and t0.99? Assume that the population of test scores for high school seniors is normally distributed. The t-value of t=nothing ▼ fall between −t0.99 and t0.99 because t0.99=nothing. (Round to two decimal places as needed.)
- Determine the probability of failure of a steel tension member in a truss that supports widely varying snow loads given the following data on the loading placed on the member (Q) and the member strength (R); Q = 8,000 lbs and COV = 0.27 and R = 15,000 lbs and COV = 0.08. First solve assuming that each variable, Q and R were represented by a normal distribution and then resolve assuming that each was best represented by a log-normal distribution.Records for the last 15 years have shown that the average rainfall in a certain region of the country, for the month of March, to be 1.20 inches, with s = 0.45 inches. A second region had an average rainfall of 1.35 inches, with s = 0.54. estimate the difference of the true average rainfalls in those two regions as a 95% C.I. with the assumption of normal populations and unequal variances.Since the Cobot’s gripper is a critical component, a reliability of 99% is desired for that component. The failure time, in hours, of the cobot’s gripper follows a lognormal distribution with µt=10.52 and σt= 1.44. the gripper is considered a consumable item (i.e., if failed, the gripper is replaced, not repaired. a. What is the MTTF? b. At what number of hours of use should the gripper be replaced to meet the desired 99% reliability?
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- In a sample of 14 randomly selected high school seniors, the mean score on a standardized test was 1197 and the standard deviation was 164.9. Further research suggests that the population mean score on this test for high school seniors is 1022. Does the t-value for the original sample fall between - to 95 and to o5? Assume that the population of test scores for high school seniors is normally distributed. The t-value of t= V fall between - to 95 and to 95 because to g5 =. (Round to two decimal places as needed.)Let {X(t)} be a geometric BM with standard deviation parameter σand drift parameter µ . Find E(X(t)).In a sample of 14 randomly selected high school seniors, the mean score on a standardized test was 1181 and the standard deviation was 162.1. Further research suggests that the population mean score on this test for high school seniors is 1019. Does the t-value for the original sample fall between −t0.99 and t0.99? Assume that the population of test scores for high school seniors is normally distributed.