Find the mean and variance for the data

xi

92

93

97

98

102

104

109

f i

3

2

3

2

6

3

3

Open in App

Solution

The data is obtained in tabular form as follows.

x_i

f i

f_ix_i

92

3

276

–8

64

192

93

2

186

–7

49

98

97

3

291

–3

9

27

98

2

196

–2

4

8

102

6

612

2

4

24

104

3

312

4

16

48

109

3

327

9

81

243

22

2200

640

Here, N = 22,

Suggest Corrections

Similar questions

\begin{matrix} x_{i} & 92 & 93 & 97 & 98 & 102 & 104 & 109 f_{i} & 3 & 2 & 3 & 2 & 6 & 3 & 3 \end{matrix}

Find the mean and variance for the data

xi	6	10	14	18	24	28	30
f i	2	4	7	12	8	4	3

Find the mean deviation about the mean for the data

x_i	5	10	15	20	25
f_i	7	4	6	3	5

Find the mean deviation about the mean for the data.

x_i	5	10	15	20	25
f_i	7	4	6	3	5

Find the mean deviation about the median for the data.

x_i	5	7	9	10	12	15
f_i	8	6	2	2	2	6

Join BYJU'S Learning Program