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The birthweights in ounces of 9 randomly selected infants from New City Hospital were the following:...

The birthweights in ounces of 9 randomly selected infants from New City Hospital were the following:

97, 168, 62, 120, 87, 117, 118, 133, 126

Infant weights are known to be normally distributed. with unknown mean of μ ounces and an unknown standard deviation σ ounces

a) Calculate the sample median for this data.

b) Calculate the sample mean for this data..

c) Calculate the sample standard deviation for this data.

d) Calculate the maximum likelihood estimate for

σ2

using this data.

e) Suppose W has a t distribution with 8 degrees of freedom. If P(W > t) = .04 then what is t?

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