# Question: For a normal population with a mean equal to 80

For a normal population with a mean equal to 80 and a standard deviation equal to 15, determine the probability of observing a sample mean of 85 or less from a sample of size 10.

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

For a population that is left skewed with a mean of 24 and a standard deviation equal to 15, determine the probability of observing a sample mean of 23 or more from a sample of size 32. Suppose Apple claims that the average wait time for a customer calling the Apple Care support line is 175 seconds. A random sample of 40 customers had an average wait time of 187 seconds. Assume the population standard ...Construct a 99% confidence interval to estimate the population mean using the following data: = 45 σ = 30 n = 40 According to Expedia.com, workers in Italy lead the world in paid vacation days, averaging 42 days per year. The following data show the number of paid vacation days for a random sample of 20 Italian workers. These data can ...The percentage of high school graduates applying to multiple colleges has been increasing over the past several years. According to the National Association for College Admission Counseling, 29% of high school students ...Post your question