MATH225 Week 5 Assignment Understanding the Empirical Rule (July 2019)

MATH 225 Statistical Reasoning for the Health Sciences

Week 5 Assignment Understanding the Empirical Rule

Question A random sample of lobster tail lengths has a sample mean of x¯=4.7 inches and sample standard deviation of s=0.4 inches. Use the Empirical Rule to determine the approximate percentage of lobster tail lengths that lie between 4.3 and 5.1 inches.

Round your answer to the nearest whole number (percent).

Question A random sample of vehicle mileage expectancies has a sample mean of x¯=169,200 miles and sample standard deviation of s=19,400 miles. Use the Empirical Rule to estimate the percentage of vehicle mileage expectancies that are more than 188,600 miles.

Round your answer to the nearest whole number (percent).

Question A random sample of small business stock prices has a sample mean of x¯=$54.82 and sample standard deviation of s=$8.95. Use the Empirical Rule to estimate the percentage of small business stock prices that are more than $81.67.

Round your answer to the nearest hundredth.

Question A random sample of CO2 levels in a school has a sample mean of x¯=598.4 ppm and 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.

Round your answer to the nearest tenth.