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24 customers from each of 2 auto dealership took a customer satisfaction survey for brake service. The survey responses are on a scale from 0 to 10, with 10 indicating complete satisfaction. You want to know if customer satisfaction in the service departments is the same or different. Your null hypothesis (H0) for this research is:
A. There is a difference in customer satisfaction.
B. There is no difference in customer satisfaction
The caffeine content of 20 brands of regular coffee is shown below. 80 82 89 85 87 30 33 44 40 46 50 55 60 62 71 90 92 75 63 65. Thus, this job helps to construct a Frequency Distribution with a class interval of 10, starting with 30.
q1. a portfolio manager was analyzing the price-earnings ratio for this years performance. his boss said thatthe
The historical reports from two major networks showed that the mean number of commercials aired during prime time was equal for both networks last year.
Consider a system of water flowing through valves from A to B. (See the accompanying diagram.) Valves 1, 2, and 3 operate independently, and each correctly opens on signal with probability .8. Find the probability distribution for Y , the number o..
Construct a frequency distribution (class, tally and frequency) for the data set using the indicated number of classes. In the table, include the midpoint, relative frequencies and cumulative frequencies.
Based on this information, and using the 0.10 level of significance, can she conclude that the digits have not been drawn from the appropriate discrete uniform distribution?
Use random sampling of clusters to estimate the mean or total of a population of your choice. In the process of carrying out the survey and making the estimate, think about or discuss with others the following:
When testing two populations with small sample sizes, do both sample sizes have to be identical? Why or why not?
First, add a variable to change the type of bus (diesel or gasoline) to a qualitative variable. If the bus type is diesel, then set the qualitative variable to 0. If the bus type is gasoline, then set the qualitative variable to 1. Develop a regre..
48 or fewer will answer the question correctly. What is the z-score that you should look up in the z-table to find the desired probability?
Based on the team's claims about waiting time, what is the probability that a sample mean for n = 25 people would be as large or larger than 4.2 minutes? What should the manager conclude based on these data?
Do people walk faster in the airport when they are departing (getting on a plane) or when they are arriving (getting off a plane)? The walking speed of travelers in San Francisco International Airport and Cleveland Hopkins International Airport ar..
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