Question

6. The length of time it takes a shopper to find a parking spot in the Costco parking lot follows a normal distribution with a mean of 4.5 minutes and a standard deviation of 1.2 minutes.

What is the probability that a randomly selected shopper will take between 3 and 5 minutes to find a parking spot? Include 4 decimal places in your answer.

7. The amount of gold found by miners in Alaska per 1,000 tons of dirt follows a normal distribution with a mean of 12 ounces and a standard deviation of 2.75 ounces.

Forty-five percent of the 1,000 ton lots will contain less than how many ounces of gold? Include 1 decimal place in your answer.

8. The length of time it takes a shopper to find a parking spot in the Costco parking lot follows a normal distribution with a mean of 4.5 minutes and a standard deviation of 1.2 minutes.

After how many minutes will 15% of shoppers be successfully parked? Include 1 decimal place in your answer

9. A beverage packager fills containers with fruit juice. The weights of the filled containers are normally distributed with a mean of 12 ounces and a standard deviation of 0.4 ounce.

Twenty-five percent of the containers will contain greater than how many ounces of juice? Include 1 decimal place in your answer.

10. The true length of boards cut at a mill with a listed length of 8 feet is normally distributed with a mean of 97 inches and a standard deviation of 2 inches.

Eighty percent of the boards will be longer than what length (in inches)? Include 1 decimal place in your answer.

Answer 1