Aaron's grandfather gave him a $12,000 gift to use towards his college expenses, and Aaron received a $1,500 academic scholarship. Including his gift and scholarship, what should Aaron estimate the total cost of his first year to be?

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Which strategy is used by public health to reduce the incidence of food poisoning?