# Question

The number of Internet users in Latin America grew from 78.5 million in 2000 to 156.6 million in 2010. Use the geometric mean to find the annual growth rate. Source: www .internetworldstats.com (accessed April 5, 2011).

## Answer to relevant Questions

(a) Find the mean and standard deviation for each sample. (b) What does this exercise show about the standard deviation? Sample A: 6, 7, 8 Sample B: 61, 62, 63 Sample C: 1000, 1001, 1002 (a) Find the coefficient of variation for prices of these three stocks. (b) Which stock has the greatest relative variation? (c) To measure variability, why not just compare the standard deviations? For each data set, which best indicates a "typical" data value (mean, median, either)? a. MPG for 7 Honda Civics: 21.8, 24.1, 24.6, 26.2, 28.4, 35.2, 36.3 b. Number of riders in 8 cars: 1, 1, 1, 1, 1, 1, 4, 6 c. Diners at 10 ...On San Martin Boulevard, embedded sensors kept track of the vehicle traffic count each hour for five weekdays, Monday through Friday between 6 a.m. and 8 p.m. (5 weeks 3 14 hours 5 70 observations). (a) Visually estimate the ...Bags of jelly beans have a mean weight of 396 gm with a standard deviation of 5 gm. Use Chebyshev's Theorem to find a lower bound for the number of bags in a sample of 200 that weigh between 386 and 406 gm.Post your question

0