Week 3 Homework Assignment Section A Question 1 For the data set below, find the first quartile. SHOW all steps Question 2 Find the variance and standard deviation for the data set below: 35 45 30 SHOW All steps 35 40 25 Question 3 Six customers purchased this number of magazines: 1 7 3 2 SHOW All work a. Find the median b. What is the Mode? c. The first quartile 3 4 SECTION B: DUE Sunday August 10, 2014 9. In a unimodal, symmetrical distribution as shown in the figure below, a. b. c. d. the median and the mode are the same, but the mean can be different. the mean, the median, and the mode are the same. the mean is the same as the median, but the mode can be different. the mean, the median, and the mode are different. 10. A consumer advocacy group tested the "on-air" lifetimes a random sample of 241 cell phone batteries. The mean lifetime was 3.2 hours with a standard deviation of 0.1 hours. The lifetimes are approximately bell-shaped. Estimate the number of batteries with lifetimes between 3.0 hours and 3.4 hours. a. b. c. d. e. 164 almost all (greater than 229) 229 12 11. For which of the following histograms is it appropriate to use the Empirical Rule a. b. c. d. all of these 13. A population has a mean population value of 40. a. b. c. d. and standard deviation 0.57 11.67 0.08 12.24 14. 14. Construct a boxplot for the data set below. a. b. c. d. d Find the z-score for a