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Chapter 6: Q. 49 (page 387)
If the area to the right of in a normal distribution is , what is the area to the left of?
The area to the left ofis
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About what percent of values lie between the first and second standard deviations from the mean (both sides)?
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.
a. If distance in feet is for a fly ball, then
b. If one fly ball is randomly chosen from this distribution, what is the probability that this ball will travel fewer than 220 feet? Sketch the graph. Scale the horizontal axis Shade the region corresponding to the probability. Find the probability.
c. Find the percentile of the distribution of fly balls. Sketch the graph, and write the probability statement.
A The distance of fly balls hit to the outfield in baseball is denoted as:
B: The probability that a randomly selected fly ball traveled fewer than 220 feet is given by
The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.3 days and a standard deviation of 2.1 days.
What is the probability of spending more than two days in recovery?
a. 0.0580
b. 0.8447
c. 0.0553
d. 0.9420
In a normal distribution, x = 6 and z = 鈥�1.7. This tells you that x = 6 is ____ standard deviations to the ____ (right or left) of the mean.
If the area to the left of in a normal distribution is , what is the area to the right of ?
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