Recent questions in Binomial probability
Binomial probability

Suppose that you are testing the hypotheses $$\displaystyle{H}_{{0}}:\mu={11}\ {v}{s}\ {H}_{{A}}:\mu>{11}.$$ A sample of size 16 results in a sample mean of 11.5 and a sample standard deviation of 1.6. What is the standard error of the mean?

Binomial probability

According to a market research firm, 52% of all residential telephone numbers in Los Angeles are unlisted. A telephone sales firm uses random digit dialing equipment that dials residential numbers at random, whether or not they are listed in the telephone directory. The firm calls 500 numbers in Los Angeles. What is the probability that at least half the numbers dialed are unlisted? (Remember to check that you can use the Normal approximation.)

Binomial probability

The mean time to sell a residential property in the area is 60 days. You select a random sample of 20 homes sold in the last year and find the mean selling time is 65 days with a standard deviation of 9 days. Based on the data, develop a 95 percent confidence interval for the population mean.

Binomial probability

Assume that females have pulse rates that are normally distributed with a mean of 74. 0 beats per minute and a standard deviation of 12.5 beats per minute. If 1 adult female is randomly selected, find the probability that her pulse rate is greater than 70 beats per minute.

Binomial probability