Illustration 116. The income of a group of 10,000 persons was found to be normally distributed with Mean Rs. 50. Show that of this Rs. 750 p.m. and Standard deviation = group about 95% had income exceeding Rs. 668 and only 5% had income exceeding Rs. 832. What was the lowest income among the richest 100 ?

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Fig. 38
Illustration 116.
The income of a group of 10,000 persons was found to be normally distributed
with Mean
Rs. 50. Show that of this
Rs. 750 p.m. and Standard deviation
group
about 95% had income exceeding Rs. 668 and only 5% had income exceeding
Rs. 832.
What was the lowest income among the richest 100 ?
Transcribed Image Text:Fig. 38 Illustration 116. The income of a group of 10,000 persons was found to be normally distributed with Mean Rs. 50. Show that of this Rs. 750 p.m. and Standard deviation group about 95% had income exceeding Rs. 668 and only 5% had income exceeding Rs. 832. What was the lowest income among the richest 100 ?
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