Q1) Estimate the mean from

x	Frequency
00 < x ≤ 10	65
10 < x ≤ 20	220
20 < x ≤ 40	375
40 < x ≤ 60	270
60 < x ≤ 80	110

[ mean =34.69]

Q1) Calculate the variance from

x	Frequency
00 < x ≤ 10	150
10 < x ≤ 20	190
20 < x ≤ 30	255
30 < x ≤ 40	240
40 < x ≤ 60	200

[ var =214.5]

Q1) Calculate the Standard Deviation from

x	Frequency
00 < x ≤ 10	105
10 < x ≤ 30	180
30 < x ≤ 50	150
50 < x ≤ 60	375
60 < x ≤ 70	100

[ Standard Deviation =19.52]

Q2) Estimate the mean from

x	Frequency
00 < x ≤ 10	145
10 < x ≤ 20	100
20 < x ≤ 40	360
40 < x ≤ 60	360
60 < x ≤ 70	230

[ mean =38.47]

Q2) Calculate the variance from

x	Frequency
00 < x ≤ 10	75
10 < x ≤ 30	260
30 < x ≤ 40	300
40 < x ≤ 50	315
50 < x ≤ 70	170

[ var =234.2]

Q2) Calculate the Standard Deviation from

x	Frequency
00 < x ≤ 10	110
10 < x ≤ 30	210
30 < x ≤ 40	420
40 < x ≤ 50	300
50 < x ≤ 60	240

[ Standard Deviation =14.55]

Q3) Estimate the mean from

x	Frequency
00 < x ≤ 10	135
10 < x ≤ 30	220
30 < x ≤ 40	315
40 < x ≤ 50	435
50 < x ≤ 70	220

[ mean =36.89]

Q3) Calculate the variance from

x	Frequency
00 < x ≤ 10	140
10 < x ≤ 20	260
20 < x ≤ 30	150
30 < x ≤ 40	300
40 < x ≤ 60	200

[ var =219.6]

Q3) Calculate the Standard Deviation from

x	Frequency
00 < x ≤ 10	75
10 < x ≤ 30	270
30 < x ≤ 50	225
50 < x ≤ 70	195
70 < x ≤ 90	100

[ Standard Deviation =22.50]

Q4) Estimate the mean from

x	Frequency
00 < x ≤ 10	145
10 < x ≤ 30	190
30 < x ≤ 50	360
50 < x ≤ 60	240
60 < x ≤ 70	200

[ mean =39.76]

Q4) Calculate the variance from

x	Frequency
00 < x ≤ 10	145
10 < x ≤ 20	150
20 < x ≤ 30	165
30 < x ≤ 50	210
50 < x ≤ 60	300

[ var =338.5]

Q4) Calculate the Standard Deviation from

x	Frequency
00 < x ≤ 10	130
10 < x ≤ 20	100
20 < x ≤ 40	315
40 < x ≤ 60	285
60 < x ≤ 80	110

[ Standard Deviation =19.66]

Q5) Estimate the mean from

x	Frequency
00 < x ≤ 10	55
10 < x ≤ 20	280
20 < x ≤ 30	270
30 < x ≤ 50	405
50 < x ≤ 60	160

[ mean =30.96]

Q5) Calculate the variance from

x	Frequency
00 < x ≤ 10	150
10 < x ≤ 30	260
30 < x ≤ 50	270
50 < x ≤ 60	300
60 < x ≤ 70	160

[ var =396.4]

Q5) Calculate the Standard Deviation from

x	Frequency
00 < x ≤ 10	60
10 < x ≤ 30	120
30 < x ≤ 40	210
40 < x ≤ 50	240
50 < x ≤ 60	210

[ Standard Deviation =14.57]