Mr Daniels Maths

Set 1

Set 2

Set 3

Q1) Estimate the mean from

x Frequency
00 < x ≤ 10 85
10 < x ≤ 30 130
30 < x ≤ 50 315
50 < x ≤ 60 450
60 < x ≤ 80 120
[ mean =44.34]

Q1) Calculate the variance from

x Frequency
00 < x ≤ 10 70
10 < x ≤ 20 210
20 < x ≤ 40 330
40 < x ≤ 50 195
50 < x ≤ 70 280
[ var =321.5]

Q1) Calculate the Standard Deviation from

x Frequency
00 < x ≤ 10 110
10 < x ≤ 30 210
30 < x ≤ 40 315
40 < x ≤ 60 450
60 < x ≤ 70 290
[ Standard Deviation =18.08]

Q2) Estimate the mean from

x Frequency
00 < x ≤ 10 60
10 < x ≤ 20 150
20 < x ≤ 40 420
40 < x ≤ 50 375
50 < x ≤ 60 260
[ mean =36.62]

Q2) Calculate the variance from

x Frequency
00 < x ≤ 10 60
10 < x ≤ 30 160
30 < x ≤ 40 150
40 < x ≤ 50 375
50 < x ≤ 60 260
[ var =208.0]

Q2) Calculate the Standard Deviation from

x Frequency
00 < x ≤ 10 60
10 < x ≤ 20 180
20 < x ≤ 40 345
40 < x ≤ 60 270
60 < x ≤ 70 160
[ Standard Deviation =18.21]

Q3) Estimate the mean from

x Frequency
00 < x ≤ 10 120
10 < x ≤ 20 110
20 < x ≤ 40 420
40 < x ≤ 60 255
60 < x ≤ 80 230
[ mean =38.50]

Q3) Calculate the variance from

x Frequency
00 < x ≤ 10 80
10 < x ≤ 20 120
20 < x ≤ 40 255
40 < x ≤ 50 330
50 < x ≤ 70 280
[ var =298.2]

Q3) Calculate the Standard Deviation from

x Frequency
00 < x ≤ 10 150
10 < x ≤ 20 120
20 < x ≤ 40 210
40 < x ≤ 50 420
50 < x ≤ 60 200
[ Standard Deviation =16.79]

Q4) Estimate the mean from

x Frequency
00 < x ≤ 10 60
10 < x ≤ 30 180
30 < x ≤ 40 390
40 < x ≤ 50 285
50 < x ≤ 60 180
[ mean =36.78]

Q4) Calculate the variance from

x Frequency
00 < x ≤ 10 80
10 < x ≤ 20 240
20 < x ≤ 40 240
40 < x ≤ 60 255
60 < x ≤ 80 100
[ var =385.4]

Q4) Calculate the Standard Deviation from

x Frequency
00 < x ≤ 10 85
10 < x ≤ 20 190
20 < x ≤ 30 360
30 < x ≤ 40 150
40 < x ≤ 60 290
[ Standard Deviation =14.45]

Q5) Estimate the mean from

x Frequency
00 < x ≤ 10 120
10 < x ≤ 30 280
30 < x ≤ 40 435
40 < x ≤ 50 315
50 < x ≤ 60 140
[ mean =33.57]

Q5) Calculate the variance from

x Frequency
00 < x ≤ 10 75
10 < x ≤ 20 200
20 < x ≤ 40 315
40 < x ≤ 60 270
60 < x ≤ 70 250
[ var =386.1]

Q5) Calculate the Standard Deviation from

x Frequency
00 < x ≤ 10 70
10 < x ≤ 30 150
30 < x ≤ 40 300
40 < x ≤ 50 375
50 < x ≤ 70 280
[ Standard Deviation =15.28]