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For the population of one town, the number of siblings, x, is a random variable whose relative frequency histogram has a reverse J-shape. The mean
For the population of one town, the number of siblings, x, is a random variable whose relative frequency histogram has a reverse
J-shape.
The mean number of siblings is
1.2
and the standard deviation is
1.4.
Let
x
denote the mean number of siblings for a random sample of size
34.
Determine whether the distribution of
x
is normal or approximately normal and find its mean and standard deviation.
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