The following are the duration in minutes of a sample of long-distance phone calls made within the continental US. as reported by one long-distance carrier: Time minutes Pro ortion Less than 5 0.37 At least 5 but less than 10 0.22 At least 10 but less than 15 0.15 At least 15 but less than 20 0.10 At least 20 but less than 25 0.07 At least 25 but less than 30 0.07 At least 30 0.02 4. Assuming these relative frequencies are valid, in a random sample of 200 calls, how many calls of less than ve minutes OR 25 minutes or more would we expect to nd? Not more than 40 More than 40 but not more than 60 More than 60 but not more than 80 More than 80 .50???\" 5. Which of the following statements most accurately reects what is meant by \"the Xth percentile?\" A. The Xth percentile is the Xth-ranked observation in the ordered array B. The Xth percentile is some value below which X percent of the observations would be expected to fall C. The Xth percentile is the likelihood that a given observation will be at or above that value D. The Xth percentile is some value above which X percent of the observations would be expected to fall 6. In a random sample of four ight arrivals we observed the following latearrival times (minutes after scheduled arrival): 9, 16, 19, 15. What was the sample standard deviation? A. Not greater than 3.7 B. Greater than 3.7 but not greater than 4.0 C. Greater than 4.0 but not greater than 4.3 D. Greater than 4.3 but not greater than 4.6 E. Greater than 4.6 7. It has been estimated that 60% of people in a given geographic area have spam- blocking protection on their mobile device. If a spammer were to call 80 randomly selected numbers in this area, what is the probability that at least 68.22% of these calls would be blocked? A. Not greater than 0.1 B. Greater than 0.1 but not greater than 0.2 C. Greater than 0.2 but not greater than 0.3 D. Greater than 0.3 but not greater than 0.4 E. Greater than 0.4