Can you help answer these problems?

Estimating / and p Exercise 1. Let's suppose we wanted to find the average amount of time De Anza College stu- dents spend watching baseball per week. Since it is impractical to ask every single student at De Anza for this piece of information, we decide to take a simple random sample of 64 students. The average time for these 64 students is 4 hours. It is also known that the standard deviation for the entire college is 1 hour. (a) How likely is it that the average for the entire college is exactly 4 hours? It is that the average is exactly four hours. (b) How likely is it that the average is "close" to 4 hours? This depends on Since the sample size , it is that 4 hours is "close". In order to address part (b) more precisely, we will use the concept of confidence intervals. Definition: A confidence interval (or interval estimate) is a range (or an interval) of values used to estimate the true value of a population parameter. A confidence interval is sometimes abbreviated as CI. Example: An example of a confidence interval for the mean baseball watching time would be (3, 5 )