. Suppose you want to test the claim that p at t]. 22 at the a : 0. 08 signicance level. Find the appropriate critical value{s) for this test. (opts) . A 95% condence interval for the average IQ among adults is {96.6, 101.2). a. What is the best guess for the average IQ among adults? (4pm) be What is the margin of error for the average IQ among adults? (413ml . Suppose you wish to estimate the proportion of cats that are blue. Find the sample size needed to assure with 94% confidence that the sample proportion will not differ from the population proportion by more than 1%. (Spts) . A study of 25 python snakes found the average length was 22.? ft. Find the margin of error needed to estimate the average length ol'all python snakes with 95% condence. Assume e is known to be 3.4 . {8pm} . A sample of 16 statistics students had an average test score 01133.? and standard deviation of 5.8. Use this information to construct a 98% condence interval estimate of the population standard deviation. Round your nal answer to one decimal place. (Bpts) . CalTrans claims the average speed at 4pm on a particular freeway is 62mph. When 12 vehicles were observed at random for their speeds { in mph) on a particular stretch of freeway. the following data was obtained: 68, 78. 69'. 61. 68. 65, 60. 64. 60. 62. 74, 6?. Assume vehicle speed is normally distributed. a. State the hypotheses and identify the claim. (3pts) b. Calculate the test statistic and p-value. (4pts) c. State your conclusion based on the u =. 05 signicance level. What does this say about the CalTrans claim? {4pts) . A Washington Post article claims that more than "We of adults worldwide are [eh-handed. A random sample of adults found 14 were loll-handed and 36 were right-handed. a. State the hypotheses and identify the claim. (3pts} b. Calculate the test statistic and p-valuc. (4pts) c. State your conclusion based on a 0.05 signicance level. Explain what your conclusion means about the percentage of adults that are left-handed so someone outside of a statistics class can understand. (4pts)