#1. The weights of a certain dog breed are approximately normally distributed with a mean of 50 pounds, and a standard deviation of 6.8 pounds. Use your graphing calculator to answer the following questions. answers in percent form. Round your answers to the nearest tenth of a percent.

a) Find the percentage of dogs of this breed that weigh less than 50 pounds. %

b) Find the percentage of dogs of this breed that weigh less than 48 pounds. %

c) Find the percentage of dogs of this breed that weigh more than 48 pounds. %

#2. Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed with a mean of 251 feet and a standard deviation of 55 feet. answers in percent form. Round your answers to the nearest tenth of a percent.

a) If one fly ball is randomly chosen from this distribution, what is the probability that this ball traveled fewer than 210 feet?

1. P
2. (fewer than 210 feet) = %

b) If one fly ball is randomly chosen from this distribution, what is the probability that this ball traveled more than 222 feet?

1. P
2. (more than 222 feet) = %

#3. For a standard normal distribution, find:

P(-1.11 < z < 1.47)

#4. The maintenance department at the main campus of a large state university receives daily requests to replace fluorecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 62 and a standard deviation of 3. Using the 68-95-99.7 rule, what is the approximate percentage of lightbulb replacement requests numbering between 62 and 65?

Do not enter the percent symbol.

ans =