Expand Your Knowledge: Split Stem The Boston Marathon is the oldest and best known U.S. marathon. It covers a route from Hopkinton, Massachusetts, to downtown Boston. The distance is approximately 26 miles. Visit the Brase/Brase statistics site at college.hmco.com/pic/braseUS9e and find the link to the Boston Marathon. Search the marathon site to find a wealth of information about the history of the race. In particular, the site gives the winning times for the Boston Marathon. They are all over 2 hours. The following data are the minutes over 2 hours for the winning male runners: 19611980 23 23 18 19 16 17 15 22 13 10 18 15 16 13 9 20 14 10 9 12 19812000 9 8 9 10 14 7 11 8 9 8 11 8 9 7 9 9 10 7 9 9 (a) Make a stem-and-leaf display for the minutes over 2 hours of the winning times for the years 1961 to 1980. Use two lines per stem.

STAT 110: Notes for Week of 10/17/16 Chapter 21 o p = population parameter. o p = sample proportion/percentage. Estimates the parameter. p = (number of successes in the sample/n) o μ = population mean/average. o x = sample mean/average. Estimates the population mean/average. o A statistic (point estimate/p) is unlikely to accurately describe the parameter, while a confidence interval (interval estimate/statistic +/- margin of error) is more likely to include the true parameter. o If the simple random sample is large enough (at least 1,000 participants), then: The proportion of p is approximately normal. The