find the P-value accurate to 4 decimal places.

A distribution of values is normal with a mean of 197.6 and a standard deviation of 24.6.Find P40, which is the score separating the bottom 40% from the top 60 P40 =

The z-score for an IQ of 105 is 0.75.Using the answer from Step 1, find the percent of the patients with IQs above 105. (Round your answer to one decimal place.)

#25 - Total cholesterol in children aged is assumed to follow a normal distribution with a mean of 191 and a standard deviation of 22.4 . What proportion of children aged 10-15 years of age have total cholesterol below 180 ?

Exactly 95% of a normal distribution is located between z = +1.96 and z = -1.96. How much of the distribution is located in the tail beyond z = +1.96?

Sunscreens are products that protect the skin from skin cancer by preventing the sun's ultraviolet (UV) radiation from penetrating the skin. According to dermatologists, the recommended amount of sunscreen needed to cover the exposed areas of the body is at least an ounce. In a study conducted specifically for a group of women aged 21 to 30 years, it was found the amount of sunscreen (X) applied by the group follows the normal distribution with mean of 0.6 ounce and standard deviation of 0.25 ounce.   The amount of sunscreen applied by women aged 21 to 30 years follows a bell-shaped distribution which is symmetric at X = _____.