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A store asked 250 of its customers whether they were satisfied with the service or not. The responses were also classified according to the gender of the customers. We want to study whether there is a relationship between satisfaction and gender.
Exam is given to 20 randomly chosen students and their average length of t time needed to finish exam was 54 minutes with standard deviation of 5.99 minutes. Test instructor's claim at the 0.05 level of significance.
Find out the cheapest way of manufacturing today's batch of NasaMist.
Make a decision regarding the null hypothesis based on the sample information. Interpret the results of the test and state your conclusion.
If Z = 1.96, s = 3, and E = 1, determine the correct sample size.
Basic Statistics problem
The law of large numbers tells us what happens in the long run. Like many games of chance, the numbers racket has outcomes so variable-one three digit number wins $600 and all others win nothing-that gamblers never reach "the long run".
To test whether there is significant mean difference between two groups using independent sample t test.
The main part of the ACS contacts 250,000 addresses by mail each month, with follow-up by phone and in person if there is no response. Each household answers questions about their housing, economic, and social status. What is the Population.
Which of the given is the example of a discrete random variable? Which of the given is an example of continuous random variable?
Given the following data, 1) how do you make Excel create a scatter diagram for you? 2) If you were to draw a line through the points, how straight would the line be?
Public transportation and the automobile are two methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
Determine 80% confidence interval for average weights of Allen's hummingbirds in study regions. Determine the margin of error?
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