# Get Solved MATH 225N Week 5 Assignment: Understanding Empirical Rule

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## Get Solved MATH 225N Week 5 Assignment Understanding Empirical Rule

1. Question: A random sample of CO2 levels in a school has a sample mean of x¯=4 ppm and a sample standard deviation of s=86.7 ppm.  Use the Empirical Rule to determine the approximate percentage of CO2 levels that lie between 338.3 and 858.5 ppm.
2. Question: Suppose that a random sample of redwood trees has a sample mean diameter of x¯=1 feet, with a sample standard deviation of s=3.7 feet. Since the diameters of redwood trees are generally symmetric and bell-shaped, we can apply the Empirical Rule. Between what two diameters are approximately 68% of the data?
3. Question: Suppose a random sample of monthly rainfalls in a given area has a sample mean of x¯=2 inches, with a sample standard deviation of s=3.5 inches. Since rainfall amounts in this area are generally symmetric and bell-shaped, we can apply the Empirical Rule. Between what two amounts are approximately 99.7% of the data?
4. Question: Suppose a random sample of adult women has a sample mean height of x¯=3 inches, with a sample standard deviation of s=2.4 inches. Since height distribution is generally symmetric and …, we can apply the Empirical Rule. Between what two heights are approximately 99.7% of the data?
5. Question: … same random sample of adult women, with a sample, mean height of x¯=3 inches and sample standard deviation of s=2.4inches,  use the Empirical Rule to determine the approximate percent of heights that lie between 59.5 inches and 69.1 inches.
6. Question: Returning to the sample of adult women, with a sample mean height of x¯=3 inches and sample standard deviation of s=2.4 inches, use the Empirical Rule to estimate the percentage of heights that are less than 61.9 inches.
7. Question: A random sample of males has a sample mean blood volume of x¯=2 liters, with a sample standard deviation of s=0.2 liters. Since blood volumes in males are generally symmetric and …, we can apply the Empirical Rule. Between what two volumes are approximately 95% of the data?
8. Question: A random sample of men’s weights has a sample mean of x¯=3 pounds and a sample standard deviation of s=12.7 pounds.   Use the Empirical Rule to determine the approximate percentage of men’s weights that lie between 156.9 and 207.7 pounds.
9. Question: A random sample of waiting times at a bus stop has a sample mean time of x¯=6 seconds, with a sample standard deviation of s=29.4 seconds. Since waiting times at this bus stop are generally symmetric and bell-shaped, we can apply the Empirical Rule. Between what two waiting times are approximately 95% of the data?
10. Question: Suppose a random sample of monthly temperatures in a given area has a sample mean of x¯=2∘F, with a sample standard deviation of s=1.5∘F. Since temperatures in this area are generally symmetric and bell-…, we can apply the Empirical Rule. Between what two temperatures are approximately 99.7% of the data?
11. Question: A random sample of small business stock prices has a sample mean of x¯=\$82 and a sample standard deviation of s=\$8.95.  Use the Empirical Rule to estimate the percentage of small business stock prices that are more than \$81.

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