An investigator thinks high school students spend too much time streaming videos. He randomly samples students and asks, "In a typical day how much time do you spend streaming videos?" Assume a standard deviation of 1.644 hours. After sampling 175 high school students from Upper Valley high schools, the investigator determined that the average student from the sample streamed videos 2 hours per day.

7 Construct a 99% confidence interval for the amount of time UpperValley high school students stream videos.

8. Construct a 90% confidence interval for the amount of time UpperValley high school students stream videos.

A study of religious practices among college students interviewed a sample of 127 students; 107 of the students said that they prayed at least once in a while. Do the data support the idea that the majority of college students pray?

9. Define "success" and "failure" in the study.

10.Does the study meet the conditions for to be used as a point estimate of P? Why/why not?