1 points
QUESTION 5
The frequency table below shows the percentages obtained in a Biometry test for a random sample of 60 students:
Interval frequency percentage Frequency*midpoint (fxm) (fxm^2)
[30 – 40) 5 b1 c1 d1
[40 – 50) 12 b2 c2 d2
[50 – 60) 18 b3 c3 d3
[60 – 70) 15 b4 c4 d4
[70 – 80) 7 b5 c5 d5
[80 – 90) 2 b6 c6 d6
[90 – 100) 1 b7 c7 d7
For the given data, find the sum of (fxm).
315
297
254
278
Expand Question Completion Status:
QUESTION 1
The frequency table below shows the percentages obtained in a Biometry test for a random sample of 60 students:
Interval fi xi F
[30 – 40) 5 b1 c1
[40 – 50) 12 b2 c2
[50 – 60) 18 b3 c3
[60 – 70) 15 b4 c4
[70 – a1) 7 b5 c5
[a1 – 90) 2 b6 c6
[90 – 100) 1 b7 c7
For the percentages obtained, find the range.
70
60
80
100
1 points
QUESTION 2
The frequency table below shows the percentages obtained in a Biometry test for a random sample of 60 students:
Interval fi xi F
[30 – 40) 5 b1 c1
[40 – 50) 12 b2 c2
[50 – 60) 18 b3 c3
[60 – 70) 15 b4 c4
[70 – a1) 7 b5 c5
[a1 – 90) 2 b6 c6
[90 – 100) 1 b7 c7
For the percentages obtained, find the persentile.
78
66.72
75.72
54
1 points
QUESTION 3
Given the following data
25 26 21 19 30 32 25 24 23
Calculate the
sample variance.
14.7
16.5
15.4
13.2
1 points
QUESTION 4
The frequency table below shows the percentages obtained in a Biometry test for a random sample of 60 students:
Interval fi xi F
[30 – 40) 5 b1 c1
[40 – 50) 12 b2 c2
[50 – 60) 18 b3 c3
[60 – 70) 15 b4 c4
[70 – a1) 7 b5 c5
[a1 – 90) 2 b6 c6
[90 – 100) 1 b7 c7
For the percentages obtained, find the sample standard deviation.
11.39
16.89
15.69
13.29
1 answer
1 answer