Mean = = 25
SD = = 4
To find P(17 < X < 33):
k = (17 - 25)/4 = - 2
k = (33 - 25)/4 = 2
By Chebyshev's Theorem:
So,
Answer is:
At least number of observations lie between 17 and 33 is:given
by:
100 X 0.75 = 75
So,
Answer is:
75
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