To find value of sample proportion.
1. Eighty-eight shoppers were interviewed at random, and 59 said that they prefer to shop alone.
a. What is the value of q-hat?
b.. Find a 90% confidence interval for p.
2. A sample of 19 albino Hungarian banded aardvarks was examined for nose length. Since this is a small sample, how various degrees of freedom will be used to find the t-score?