# Question: Assume that 10 of us believe that college is not

Assume that 10% of us believe that college is not a good investment (based on a survey in USA Today).

a. Let A denote the event of selecting someone who believes that college is not a good investment. What does the event A denote?

b. Find the value of P(A).

c. Find the probability of randomly selecting three different people and finding that each of them has the belief that college is not a good investment.

d. The given rate of 10% is based on results from Internet users who chose to respond to a question posted on the USA Today web site. What is this type of sample called? What does this suggest about the accuracy of the 10% rate?

a. Let A denote the event of selecting someone who believes that college is not a good investment. What does the event A denote?

b. Find the value of P(A).

c. Find the probability of randomly selecting three different people and finding that each of them has the belief that college is not a good investment.

d. The given rate of 10% is based on results from Internet users who chose to respond to a question posted on the USA Today web site. What is this type of sample called? What does this suggest about the accuracy of the 10% rate?

**View Solution:**## Answer to relevant Questions

Birth weights in the United States have a distribution that is approximately normal with a mean of 3369 g and a standard deviation of 567 g (based on data from “Comparison of Birth Weight Distributions between Chinese and ...Given specific sample data, such as the data given in Exercise 1, which confidence interval is wider: the 95% confidence interval or the 80% confidence interval? Why is it wider? When she was 9 years of age, Emily Rosa did a science fair experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped coin to select either her right hand or her ...Cell Phones and Cancer A study of 420,095 Danish cell phone users found that 0.0321% of them developed cancer of the brain or nervous system. Prior to this study of cell phone use, the rate of such cancer was found to be ...You have been given the task of estimating the percentage of Southwest flights that arrive on time, which is no later than 15 minutes after the scheduled arrival time. How many flights must you survey in order to be 80% ...Post your question