6.08

The weights of bags of ready-to-eat salad are normally distributed with a mean of 300 grams and a standard deviation of 9 grams. What percent of the bags weigh less than 291 grams?

16%

The number of nails in a 5 lb box is normally distributed with a mean of 325 nails and a standard deviation of 15 nails. Suppose that 1200 different 5 lb boxes are in a warehouse. About how many boxes contain more than 340 nails?

192

Times for an ambulance to respond to a medical emergency in a certain town are normally distributed with a mean of 450 seconds and a standard deviation of 50 seconds. Suppose there are 288 emergencies in that town. In about how many emergencies are the response times expected between 400 seconds and 500 seconds?

196

The weights of bags of ready-to-eat salad are normally distributed with a mean of 300 grams and a standard deviation of 9 grams. What percent of the bags weigh less than 282 grams?

2.5%

The weight of a soccer ball is normally distributed with a mean of 0.43 kg and a standard deviation of 0.01 kg. Suppose 800 different soccer balls are in a warehouse. About how many soccer balls weigh more than 0.45 kg?

20

Times for an ambulance to respond to a medical emergency in a certain town are normally distributed with a mean of 450 seconds and a standard deviation of 50 seconds. Suppose there are 97 emergencies in that town. In about how many emergencies are the response times expected between 400 seconds and 500 seconds?

66

Suppose the heights of professional horse jockeys are normally distributed with a mean of 62 in. and a standard deviation of 2 in. Which group describes 16% of the population of horse jockeys? Select each correct answer.

jockeys who are taller than 64 in. jockeys who are shorter than 60 in.

Suppose the length of an oarfish is normally distributed with a mean of 6.5 m and a standard deviation of 1.5 m. Which group describes 16% of the oarfish population? Select each correct answer.

oarfish that are shorter than 5 m oarfish that are longer than 8 m

Select Yes or No to state whether each data set is likely to be normally distributed. the number of eggs collected each week on a large farm the number of yolks in randomly selected eggs the weights of eggs in the kitchen of a restaurant the number of eggs in cartons sold at a supermarket

yes no yes no

Select Yes or No to state whether each data set is likely to be normally distributed. the weights of one species of adult turtles that live in a lake the number of legs on all the cows that live on a farm the number of days it rains per year in a given city over several years the number of raisins in each bar in the same batch of oatmeal raisin bars

yes no yes yes