Statistics > ANSWERS AND COMMENTARIES > Descriptive statistics and probability STA1501 (All)

Descriptive statistics and probability STA1501

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QUESTION 1 True QUESTION 2 True QUESTION 3 False QUESTION 4 False QUESTION 5 False QUESTION 6 True QUESTION 7 False QUESTION 8 True QUESTION 9 False QUESTION 10 True 2 STA1501/201 ... /2/2019 PART B: 80 MARKS QUESTION 11 (a) The clustered bar chart is (5) (b) (i) We begin by arranging the data set in ascending order as follows: 16 28 29 41 42 44 52 54 54 54 58 66 70 72 72 78 78 84 91 92 Position of a percentile is L p D .n C 1/ p 100 observation 3 The position of the lower quartile .Q1/; the 25th percentile is L25 D .20 C 1/ 25 100 D 5:25th observation The value of the 25th percentile is D 5 th C 0:25[6th 5 th] observation D 42 C 0:25 .44 42/ D 42 C 0:25.2/ D 42:5 The position of the upper quartile .Q3/; the 75th percentile is L75 D .20 C 1/ 75 100 D 15:75th observation The value of the 75th percentile is D 15th C 0:75[16th 15th] observation D 72 C 0:75 .78 72/ D 72 C 0:75.6/ D 72 C 4:5 D 76:5 The interquartile range is I Q R D Q3 Q1 D 76:5 [Show More]

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