STATS 200 Homework Week 5- New

STATS 200 Homework Week 5- New

STATS 200 Homework Week 5- New

http://hwcampus.com/shop/stats-200-homework-week-5-new/

1) Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed with a mean of 250 feet and a standard deviation of 50 feet. We randomly sample 49 fly balls.

a. If X ¯ = average distance in feet for 49 fly balls, then X ¯ ~ _______(_______,_______)

b. What is the probability that the 49 balls traveled an average of less than 240 feet? Sketch the graph. Scale the horizontal axis for X ¯ . Shade the region corresponding to the probability. Find the probability.

c. Find the 80th percentile of the distribution of the average of 49 fly balls.

2) Which of the following is NOT TRUE about the distribution for averages?

a. The mean, median, and mode are equal.
b. The area under the curve is one.
c. The curve never touches the x-axis.
d. The curve is skewed to the right.

3) A typical adult has an average IQ score of 105 with a standard deviation of 20. If 20 randomly selected adults are given an IQ tests, what is the probability that the sample mean scores will be between 85 and 125 points?

STATS 200 Homework Week 5- New

http://hwcampus.com/shop/stats-200-homework-week-5-new/

1) Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed with a mean of 250 feet and a standard deviation of 50 feet. We randomly sample 49 fly balls.

a. If X ¯ = average distance in feet for 49 fly balls, then X ¯ ~ _______(_______,_______)

b. What is the probability that the 49 balls traveled an average of less than 240 feet? Sketch the graph. Scale the horizontal axis for X ¯ . Shade the region corresponding to the probability. Find the probability.

c. Find the 80th percentile of the distribution of the average of 49 fly balls.

2) Which of the following is NOT TRUE about the distribution for averages?...