The red blood cell counts (in millions of cells per microliter) for a population of adult males can be approximated by a normal distribution, with a mean of 5.1 million cells per microliter and a standard deviation of 0.4 million cells per microliter. a) What is the minimum red blood cell count that can be in the top 22% of counts? "b) What is the maximum red blood cell count that can be in the bottom 14% of counts? a) The minimum red blood cell count is Round to two decimal places as needed.) million cells per microliter.

The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 65 ounces and a standard deviation of 3 ounces. Use the Empirical Rule. Suggestion: sketch the distribution in order to answer these questions. a) 99.7% of the widget weights lie between and b) What percentage of the widget weights lie between 59 and 74 ounces? c) What percentage of the widget weights lie below 68 ? %

The time taken for a computer to boot up, X, follows a mound-shaped (i.e. bell-shaped) distribution with a mean of 30 seconds and a standard deviation of 5 seconds. What is the standardized score for a boot up time of... a. x = 30 seconds? b. x = 20 seconds? c. x = 35 seconds? 1 Z-Score = Z-Score = Z-Score = h

What is the SD of a distribution if the mean is 4.5 and a z score of 3.5 corresponds to a raw score of 15?