Useful answers and mathematical terminology.

Percentiles Assignment 1. Eighteen executives reported the following number of telephone calls made during a randomly selected week. 22 14 12 9 54 12 16 12 14 49 10 14 8 21 37 28 36 22 For this information determine the following: a. 1st decile, b. P34, c. median, d. third quartile. Int: Remember, to determine the values of percentiles, the data must first be arranged in an array. 1. The growth (in centimeters) of a certain variety of plant after 20 days is shown below. 20 12 39 38 41 43 51 52 59 55 53 59 50 58 35 38 23 32 43 53 For this information determine the following: a. D2. b. Q1, c. median, d. 7th decile. 1. The airborne speeds in kilometers per hour of 21 planes are shown below. Find the approximate values that correspond to the given percentiles by constructing a percentile graph. Class Frequency 366 to under 386 4 386 to under 406 2 406 to under 426 3 426 to under 446 2 446 to under 466 466 to under 486 IN 486 to under 506 3 506 to under 526 a. 9th percentile b. 9th decile c. median d. Q1 e. percentile rank of 450 km/h