10:02 am Mon 22 Nov - % – 100% moodle.port.ac.uk - Private 2021-22 Page 1 of 3 3 of 4 2 (a) The primary measure of a pil

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10 02 Am Mon 22 Nov 100 Moodle Port Ac Uk Private 2021 22 Page 1 Of 3 3 Of 4 2 A The Primary Measure Of A Pil 1 (61.22 KiB) Viewed 69 times

10:02 am Mon 22 Nov - % – 100% moodle.port.ac.uk - Private 2021-22 Page 1 of 3 3 of 4 2 (a) The primary measure of a pilot's experience is the total amount of time spent piloting aircraft (flight hours or flight time). The flight times (in thousands of hours) of seven pilots with a certain airline are (2, 4, 1, 3, 7, 2, 9). Find the average, the middle and the most frequent (typical) value of their flight hours. (5 Marks) (b) A lecturer will conduct a quiz test in a class of 40 students and sets its duration to 17 min. Experience suggests that the distribution of the time needed by a student to complete the test is bell-shaped (approximately normal) with mean 13 min and standard deviation 2 min. Determine: (1) The number of students who will fail to complete the test. [4 Marks) (ii) The number of students who will complete it within 11 min. (4 Marks] (iii) The test duration so that all students could complete it. [2 Marks) (c) The yearly salaries of three different rank employees working for a company are £10000, £20000 and £60000. The years of experience for these employees are 28, 29 and 33 years, respectively. Determine the variation in salaries and in years of experience for these employees. Justify your choice of the measure of variability. (10 Marks]