Question

Q1: A group of 50 biomedical students recorded their pulses rates by counting the number of beats for 60 seconds. (15)

80

48

88

70

84

82

66

84

82

64

44

72

90

70

86

104

58

84

72

60

90

108

62

52

72

86

66

104

78

82

96

54

68

76

72

88

102

74

68

74

78

66

72

90

62

100

92

84

76

72



(a) Construct frequency distribution.

(b) Compute mode, median and mean of the frequency distribution.

(c) The lower and upper quartile of the frequency distribution.

Answer 1

The answers are in the explanation.

Explanation:

a)

X1 -Absolute frecuency -cumulative absolute frequency -Relative frecuency

44 1 1 0.021

48 1 2 0.021

52 1 3 0.021

54 1 4 0.021

58 1 5 0.021

60 1 6 0.021

62 2 7 0.042

64 1 8 0.021

66 3 12 0.063

68 2 14 0.042

70 2 16 0.042

72 6 22 0.126

74 2 24 0.042

76 2 26 0.042

78 2 28 0.042

80 1 29 0.021

82 3 32 0.063

84 4 36 0.084

86 2 38 0.042

88 2 40 0.042

90 3 43 0.063

92 1 44 0.021

96 1 45 0.021

100 1 46 0.021

102 1 47 0.021

104 2 49 0.042

108 1 50 0.021

Total: 50 50 1

• b) Mean: is the number average = 3806/48 = 78.12

• Median: is the number or average number of half = 76

• Mode: Is the number that appears most frequently = 72

• c) Lower quartile: 67

• Upper quartile: 84