Suppose the weights of randomly selected American female college students are normally distributed with unknown mean ? and standard deviation ?. A random sample of 10 American female college students...

Suppose the weights of randomly selected American female college students are normally distributed with unknown mean ? and standard deviation ?. A random sample of 10 American female college students yielded the following weights (in pounds):
115 122 130 127 149 160 152 138 149 180
a) Using the given sample, find a maximum likelihood estimate of ?.
b) Discuss the at least one of the properties of estimators ?̂ (Unbiasedness, Consistency
and Efectiveness) of the estimator you obtain.