In a study of exercise, a large group of male runners walk on a treadmill for six minutes. Their heart rates in beats per minute at the end vary from runner to runner according to the ?(104,12.5) distribution. The heart rates for male nonrunners after the same exercise have the ?(130,17) distribution. (a) What percent of the runners have heart rates above 140? Give your answer to two decimal places.   (b) What percent of the nonrunners have heart rates above 140? Give your answer to two decimal places.

What is (b) p(z>-0.15) = ?  Answer choices are .3945, -1,04,.5596,.6055,.4404

Assume critical reading scores for a standardized test are distributed as ​N(570​, 50​). Complete parts​ (a) through​ (d) below.       a. Find the test score at the 75th percentile.   The 75th percentile is nothing. ​(Round to the nearest integer as​ needed.) b. Find the test score at the 25th percentile.   The 25th percentile is nothing. ​(Round to the nearest integer as​ needed.) c. Find the interquartile range for test scores.   The interquartile range is nothing. ​(Round to the nearest integer as​ needed.) d. Is the interquartile range larger or smaller than the standard​ deviation?   The interquartile range is ▼   smaller larger than the standard deviation.

Given P(E) = 0.22 , P(F) = 0.28 , and P(E and F) =0.10. what is P(E or F)?