1. A numerical descriptive measure calculated from the entire population is called ____.
2. A student walks down the hall of the Communications 3 Building between classes and asks students how much time they spend studying for classes per week. Identify the type of sampling technique used in this situation (specify if random or nonrandom).
3. Suppose the average mileage rating (in miles per gallon) of a particular model car is 28 mpg with a standard deviation of 8 mpg. A random sample of 64 cars of this model is selected. Which Excel statement will find the probability that the sample mean exceeds 30 mpg?
4. Graduate students applying for entrance to many universities must take a Miller Analogies Test. It is known the test scores have a mean of 75 and a variance of 16. This year, one hundred students applied for entrance into graduate school in physics. Find the probability that the average score of this group of students is higher than 76. Round your result to 4 decimal places.