Fri 7 Dec, 2018 04:33 pm - Ruby, a bowler, has a sample game score mean of 170.4 from 27 games. Ruby still claims that her average game score is 199, and the low average can be attributed to chance. At the 1% significance... (view)
Fri 7 Dec, 2018 04:31 pm - The population mean of a set of data is unknown. The sample mean is 32, and the error bound for the mean is 8, at a 68% confidence level. (So, x¯=32 and EBM = 8.) Find and interpret the... (view)
Fri 7 Dec, 2018 04:30 pm - Gail averages 153 points per bowling game with a standard deviation of 14.5 points. Suppose Gail's points per bowling game are normally distributed. Let X= the number of points per bowling... (view)
Fri 7 Dec, 2018 04:29 pm - The population standard deviation for the weights of boxes of breakfast cereal is 0.6 ounces. If we want to be 90% confident that the sample mean is within 1 ounce of the true population mean, what... (view)
Fri 7 Dec, 2018 04:27 pm - Suppose a clothing store wants to determine the current percentage of customers who are over the age of forty. How many customers should the company survey in order to be 98% confident that the... (view)
