Chapter 6: Q.4 (page 385)
A company manufactures rubber balls. The mean diameter of a ball is with a standard deviation of 0.2 cm. Define the random variable in words. ______________.
Short Answer
Diameter of a ball in centimeter.
Chapter 6: Q.4 (page 385)
A company manufactures rubber balls. The mean diameter of a ball is with a standard deviation of 0.2 cm. Define the random variable in words. ______________.
Diameter of a ball in centimeter.
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Get started for freeIs X~N() a standardized normal distribution? Why or why not?
In a normal distribution, x = โ2 and z = 6. This tells you that x = โ2 is ____ standard deviations to the ____ (right or left) of the mean.
Using the information from Example 6.12, answer the following:
The percent of fat calories that a person in America consumes each day is normally distributed with a mean of about 36 and a standard deviation of 10 . Suppose that one individual is randomly chosen. Letpercent of fat calories.
a. ----------
b. Find the probability that the percent of fat calories a person consumes is more than 40 . Graph the situation. Shade in the area to be determined.
c. Find the maximum number for the lower quarter of percent of fat calories. Sketch the graph and write the probability statement.
Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed with a mean of feet and a standard deviation of feet.
a. If distance in feet for a fly ball, then (------)
b. If one fly ball is randomly chosen from this distribution, what is the probability that this ball traveled fewer than 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.
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