The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 48 ounces and a standard deviation of 7 ounces. a) 95% of the widget weights lie between and b) What percentage of the widget weights lie between 27 and 62 ounces? % c) What percentage of the widget weights lie above 41 ?

The head librarian at the library of congress has asked her assistant for an interval estimate of the mean number of books checked out each day. the assistant provides the following interval estimate: from 740 to 920 books per day. what is an efficient, unbiased point estimate of the number of books checked out each day at the library of congress?

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

Write the rational number in lowest terms 99/-15