For Q. 24 - 40: Compressive strength (in thousand psi) was measured on 60 specimens of a new aluminum alloy undergoing development as a material for the next generation of aircraft. 66.4 67.7 68.0 68.0 68.3 68.4 68.6 68.8 68.9 69.0 71.9 72.1 72.2 72.3 72.4 69.2 69.3 69.3 69.5 69.5 69.6 69.7 69.8 69.8 69.9 72.6 72.7 72.9 73.1 73.3 70.0 70.1 70.2 70.3 70.3 70.4 70.5 70.6 70.6 70.8 74.2 74.5 75.3 70.4 68.8

71.0 71.1 71.2 71.3 71.3 71.5 71.6 71.6 71.7 71.8 69.5 67.3 72.5 70.2 73.2

(24) The sample in this study isA Compressive strength B 60 specimens of a new aluminum alloy C next generation D aircraft

(26) The variable of interest isA Compressive strength B 60 specimensC next generation D material

(25) The sample size isA Compressive strength B 60 specimensC next generation D material

(26) The variable of interest isA Compressive strength B 60 specimensC next generation D material

(27) The median of data is A 69.35 B 70.4 C 70.62 D 69.5

(28) The mean of data is A 69.35 B 70.4 C 70.62 D 69.5

(29) The mode of data isA 69.35 B 70.4 C 70.62 D 69.5

(30) The first quartile of data isA 69.35 B 70.4 C 70.62 D 69.5

(31) The third quartile data isA -71.88 B 88.71 C 70.62 D 71.88

(32) The minimum and maximum respectively values areA 66.4 and 75.3 B 64.4 and 57.3 C 66.4 and 100 D 50 and 75.3

(33) The range of data isA 60 B -10.2 C 9.8 D 8.9

(34) The interquartile rang of data isA 2.53 B 3.36 C 1.83 D 2.59

(35) The variance of data isA 2.53 B 3.36 C 1.83 D 2.59

(36) The standard deviation of data isA 2.53 B 3.36 C 1.83 D 2.59

(37) The coefficient of variation of data isA 2.53 B 3.36 C 1.83 D 2.59

(38) The histogram graphical representation of these data with five intervals isA

757 47 37 27 17 06 96 86 76 6

18

16

14

12

10

8

6

4

2

0

Compressive strength

Frequency

Histogram of Compressive strength

B

74.57 2.57 0.56 8.56 6.5

25

20

15

10

5

0

Compressive strength

Frequency

Histogram of Compressive strength

C

84.58 2.58 0.57 8.57 6.5

25

20

15

10

5

0

Compressive strength

Frequency

Histogram of Compressive strength

D

64.56 2.56 0.55 8.55 6.5

25

20

15

10

5

0

Compressive strength

Frequency

Histogram of Compressive strength

(39) The frequency distribution table of data is(A) Class Intervals 65.5-67.5 67.5-69.5 69.5-71.5 71.5-73.5 73.5-75.5 frequency 2 13 25 17 3

(B) Class Intervals 75.5-77.5 77.5-79.5 79.5-81.5 81.5-73.5 83.5-85.5 frequency 2 13 25 17 3

(C) Class Intervals 65.5-67.5 67.5-69.5 69.5-71.5 71.5-73.5 73.5-75.5 frequency 2 15 25 15 3

(D) Class Intervals 55.5-67.5 57.5-59.5 59.5-61.5 61.5-63.5 63.5-65.5 frequency 2 13 25 17 3

(40) The relative frequency table of data is(A ) Class Intervals 65.5-67.5 67.5-69.5 69.5-71.5 71.5-73.5 73.5-75.5 frequency 0.05 0.25 0.45 0.25 0.05

(B ) Class Intervals 65.5-67.5 67.5-69.5 69.5-71.5 71.5-73.5 73.5-75.5 frequency 0.03 0.20 0.42 0.25 0.05

(C ) Class Intervals 65.5-67.5 67.5-69.5 69.5-71.5 71.5-73.5 73.5-75.5 frequency 0.03 0.22 0.42 0.28 0.05

(D ) Class Intervals 75.5-77.5 77.5-79.5 79.5-81.5 81.5-83.5 83.5-85.5 frequency 0.03 0.22 0.42 0.28 0.05