A local supermarket has contracted for floor cleaning and polishing to be done each evening by a small work crew using mechanized equipment. After the crew has performed the service for several weeks and settled into a routine, the supermarket manager has timed the most recent jobs to get a better idea as to the nature of the distribution of times for performing the task. Over the past week, the cleaning and polishing times have been 61, 44, 57, 49, 59, 43, and 42 minutes. Using the 0.10 level of significance, apply the Kolmogorov-Smirnov test for normality in examining whether the population of cleaning times might be normally distributed.
Answer to relevant QuestionsWhat is the Spearman coefficient of rank correlation, what range of values can it have, and how is its numerical value interpreted? According to R.L. Polk & Company, the median age of automobiles and trucks on the road in the United States is about 9 years. The ages for a random sample of vehicles in the executive parking lot of a metal fabrication ...Comparing the lifetimes of two brands of penlight batteries, a researcher has randomly selected 10 batteries of brand A and 10 of brand B, then subjected each battery to the same usage test. Given the lifetimes listed below ...Prior to taking an aerobics class, each of 12 health-club members is asked to rate the instructor on a scale in which 3 = “excellent,” 2 = “good,” and 1 = “poor.” Following the class, each student is again asked ...A new taxi driver will be making regular trips from the airport to a downtown hotel. She has heard conflicting opinions as to which of two routes takes less time. When she randomly selects which route to take for each of 10 ...
Post your question