Problem 9
Find the indicated area under the standard normal curve. If convenient, use technology to find the area. To the right of \(z=-0.46\)
Problem 13
Find the indicated area under the standard normal curve. If convenient, use technology to find the area. Between \(z=-1.96\) and \(z=0\)
Problem 24
Find the indicated probability using the standard normal distribution. If
convenient, use technology to find the probability.
$$P(0.42
Problem 41
Use the Standard Normal Table or technology to find the \(z\)-score that corresponds to the cumulative area or percentile. $$P_{67}$$
Problem 69
Determine whether you can use a normal distribution to approximate the binomial distribution. If you can, use the normal distribution to approximate the indicated probabilities and sketch their graphs. If you cannot, explain why and use a binomial distribution to find the indicated probabilities. A survey of U.S. adults found that \(32 \%\) have an online account with their healthcare provider. You randomly select 70 U.S. adults and ask them whether they have an online account with their healthcare provider. Find the probability that the number who have an online account with their healthcare provider is (a) at most 15 , (b) exactly 25 , and (c) greater than 30 . Identify any unusual events. Explain. (Source: Pew Research Center)