# Question

According to the U. S. Census Bureau, 47.5% of the U.S. population lives in the Eastern Time Zone. A random sample of 50 U.S. residents is selected. Use the normal approximation to the binomial distribution to answer the following:

a. Calculate the mean and standard deviation for this distribution.

b. What is the probability that less than 20 people from the sample live in the Eastern Time Zone?

c. What is the probability that exactly 27 people from the sample live in the Eastern Time Zone?

d. What is the probability that more than 22 people from the sample live in the Eastern Time Zone?

e. What is the probability that 26, 27, or 28 people from the sample live in the Eastern Time Zone?

a. Calculate the mean and standard deviation for this distribution.

b. What is the probability that less than 20 people from the sample live in the Eastern Time Zone?

c. What is the probability that exactly 27 people from the sample live in the Eastern Time Zone?

d. What is the probability that more than 22 people from the sample live in the Eastern Time Zone?

e. What is the probability that 26, 27, or 28 people from the sample live in the Eastern Time Zone?

## Answer to relevant Questions

The average number of days that a house was on the market in Austin, Texas, in January 2013 was 71 days. Assume the time on the market follows an exponential probability distribution. a. What is the probability that a ...Suppose the time between hits on an e commerce Web site follows the exponential distribution with a mean time of 2.7 minutes. a. What is the probability that next hit on the Web site will occur within the next 5 minutes? ...The average number of miles driven on a full tank of gas in a Hyundai Veracruz before its low- fuel light comes on is 320. Assume this mileage follows the normal distribution with a standard deviation of 30 miles. What is ...Iron Hill Café is a full service restaurant in Columbus, Ohio, which is owned and managed by John Stevens. The number of minutes that diners spend at the table has a major impact on the profitability of the restaurant. ...According to the Organisation for Economic Co operation and Development (OECD), adults in the United States worked an average of 1,787 hours in 2011. Assume the population standard deviation is 400 hours and that a random ...Post your question

0