Question 1
Provide an appropriate response.
In a normal distribution, approximately what percent of data items fall within 1 standard deviation of the mean (in both directions)?
◦ 65%
◦ 68%
◦ 95%
◦ 99.7%
Question 2
Provide an appropriate response.
If an adult male is told that his height is within 2 standard deviations of the mean of the normal distribution of heights of adult males, what can he assume?
◦ He is taller than about 99.7% of the other men whose heights were measured.
◦ He is taller than about 95% of the other men whose heights were measured.
◦ His height measurement is in the same range as about 99.7% of the other adult males whose heights were measured.
◦ His height measurement is in the same range as about 95% of the other adult males whose heights were measured.
Adult Acorn Worm
Adult European beewolf (Philanthus triangulum) feeding on nectar
Male pattern baldness
Male Reproductive System - Spermatic cord
Structure of a mature sperm, a male gamete.