the weights of members of a baseball league are normally distributed with a mean of 176 pounds and a standard deviation of 11.4 pounds. Comsider a league membership of 120 members.

How many of the members will weigh 165 pounds or more?

67

76

80

100

jj88778 Apr 3, 2019

#1**0 **

176 pounds - 165 pounds = 11 pounds this is 11/ 11.6 standard deviation less than the mean = - .9483 z-score =~ .95 z score

Look at negative z-score table for the value under -.95 z-score to find the fraction .1711

.1711 x 120 members = 20.53 members are LESS than 165# that means 100 members weigh MORE than 165#

ElectricPavlov Apr 4, 2019