CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Find the mean and variance for the data
Xi92939798102104109
fi
3232633

Open in App
Solution

The data is obtained in tabular form as follows
Xi fi fi¯X Xi¯X (Xi¯X)2 fi(Xi¯X)2
923276-864192
932186-74998
973291-3927
982196-248
10266122424
104331241648
1093327981243
1093327981243

222200

640
Here , N=22, 7i=1fiXi=2200
¯X=1N7i=1fixi=122×2200=100
and Variance (σ2)=1N7i=1fi(Xi¯X)2=122×640=29.09

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Standard Deviation about Mean for Frequency Distributions
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon