Mr Daniels Maths

Set 1

Set 2

Set 3

Q1) Estimate the mean from

x Frequency
00 < x ≤ 10 115
10 < x ≤ 20 220
20 < x ≤ 30 270
30 < x ≤ 50 195
50 < x ≤ 70 230
[ mean =31.29]

Q1) Calculate the variance from

x Frequency
00 < x ≤ 10 115
10 < x ≤ 20 180
20 < x ≤ 30 180
30 < x ≤ 40 345
40 < x ≤ 50 110
[ var =150.4]

Q1) Calculate the Standard Deviation from

x Frequency
00 < x ≤ 10 115
10 < x ≤ 30 300
30 < x ≤ 50 150
50 < x ≤ 60 405
60 < x ≤ 80 150
[ Standard Deviation =20.85]

Q2) Estimate the mean from

x Frequency
00 < x ≤ 10 145
10 < x ≤ 20 200
20 < x ≤ 40 435
40 < x ≤ 60 345
60 < x ≤ 80 150
[ mean =34.92]

Q2) Calculate the variance from

x Frequency
00 < x ≤ 10 145
10 < x ≤ 20 270
20 < x ≤ 40 225
40 < x ≤ 50 240
50 < x ≤ 60 250
[ var =316.3]

Q2) Calculate the Standard Deviation from

x Frequency
00 < x ≤ 10 75
10 < x ≤ 20 150
20 < x ≤ 30 270
30 < x ≤ 40 330
40 < x ≤ 50 290
[ Standard Deviation =12.00]

Q3) Estimate the mean from

x Frequency
00 < x ≤ 10 100
10 < x ≤ 20 210
20 < x ≤ 30 420
30 < x ≤ 40 180
40 < x ≤ 50 100
[ mean =24.70]

Q3) Calculate the variance from

x Frequency
00 < x ≤ 10 65
10 < x ≤ 20 100
20 < x ≤ 40 255
40 < x ≤ 60 300
60 < x ≤ 70 100
[ var =312.3]

Q3) Calculate the Standard Deviation from

x Frequency
00 < x ≤ 10 125
10 < x ≤ 30 220
30 < x ≤ 40 390
40 < x ≤ 60 450
60 < x ≤ 80 130
[ Standard Deviation =17.63]

Q4) Estimate the mean from

x Frequency
00 < x ≤ 10 95
10 < x ≤ 20 290
20 < x ≤ 40 330
40 < x ≤ 50 240
50 < x ≤ 70 130
[ mean =30.71]

Q4) Calculate the variance from

x Frequency
00 < x ≤ 10 70
10 < x ≤ 20 220
20 < x ≤ 30 420
30 < x ≤ 40 450
40 < x ≤ 60 290
[ var =158.9]

Q4) Calculate the Standard Deviation from

x Frequency
00 < x ≤ 10 90
10 < x ≤ 20 120
20 < x ≤ 40 150
40 < x ≤ 60 270
60 < x ≤ 70 280
[ Standard Deviation =20.90]

Q5) Estimate the mean from

x Frequency
00 < x ≤ 10 70
10 < x ≤ 30 120
30 < x ≤ 50 150
50 < x ≤ 70 240
70 < x ≤ 80 250
[ mean =50.48]

Q5) Calculate the variance from

x Frequency
00 < x ≤ 10 115
10 < x ≤ 30 130
30 < x ≤ 40 375
40 < x ≤ 60 435
60 < x ≤ 80 160
[ var =320.5]

Q5) Calculate the Standard Deviation from

x Frequency
00 < x ≤ 10 135
10 < x ≤ 30 150
30 < x ≤ 50 180
50 < x ≤ 60 180
60 < x ≤ 70 240
[ Standard Deviation =21.65]