2. Use technology or a z-distribution table to find the indicated area. The scores for a bowling tournament are normally distributed with a mean of 240 and a standard deviation of 100. Julian scored 240 at the tournament. What percent of bowlers scored less than Julian?

A. 10

B. 25

C. 50

D. 75

3. Use technology or a z-distribution table to find the indicated area. The odometer readings on a random sample of identical model sports cars are normally distributed with a mean of 120,000 miles and a standard deviation of 30,000 miles. Consider a group of 6000 sports cars. Approximately how many sports cars will have less than 150,000 miles on the odometer?

A. 300

B. 951

C. 5048

D. 5700

Question

Mathematics

Nyasia Frank

7 January, 19:05

2. Use technology or a z-distribution table to find the indicated area. The scores for a bowling tournament are normally distributed with a mean of 240 and a standard deviation of 100. Julian scored 240 at the tournament. What percent of bowlers scored less than Julian?

A. 10

B. 25

C. 50

D. 75

3. Use technology or a z-distribution table to find the indicated area. The odometer readings on a random sample of identical model sports cars are normally distributed with a mean of 120,000 miles and a standard deviation of 30,000 miles. Consider a group of 6000 sports cars. Approximately how many sports cars will have less than 150,000 miles on the odometer?

A. 300

B. 951

C. 5048

D. 5700

+3

Answers (1)

Know the Answer?

Shawn · Answer 1

2. Julian scored 240 and a mean is also 240. Therefore he scored better than 1/2 of bowlers.

Answer: C) 50%

3. Mean = 120,000 miles

Standard deviation = 30,000 miles

150,000 miles = Mean + 1 standard deviation

From table for the Normal Distribution:

F (z = 1) = 0.84134

6,000 * 0.84134 = 5,048.04 ≈ 5,048

Answer: C) 5,048