In a regional high school swim meet, women's times (in seconds) in the 200-yard freestyle ranged from 109.7 to 126.2. Estimate the standard deviation, using the Empirical Rule.
Answer to relevant QuestionsFind the original data value corresponding to each standardized z-score. a. Student GPAs: Bob's z-score z = + 1.71, μ = 2.98, σ = 0.36 b. Weekly work hours: Sarah's z-score z = + 1.18, μ = 21.6, σ = 7.1 c. Bowling ...The Comer-Correr Taco Wagon is only open from 11:00 a.m. to 2:00 p.m. on Saturday. The owner kept track of the number of customers served on Saturday for 60 weeks. (a) Visually estimate the quartiles Q1 , Q2 , Q3 . (b) ...For a sample of (X, Y) data values, the covariance is 48.724, the standard deviation of X is 11.724, and the standard deviation of Y is 8.244. (a) Find the sample correlation coefficient. (b) What does the sample correlation ...The average time a Boulder High varsity lacrosse player plays in a game is 30 minutes with a standard deviation of 7 minutes. Nolan's playing time in last week's game against Fairview was 48 minutes. (a) Calculate the ...The table below shows estimates of the total cost of repairs in four bumper tests (full frontal, front corner, full rear, rear corner) on 17 cars. (a) Calculate the mean and median. (b) Would you say the data are skewed? (c) ...
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