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Q1) A sample of 3,014 steelworkers was chosen to determine if they will go on strike on Monday. Over 50% (actually 53.2%), of those in sample said they would go out on strike. As number sampled is large and those advocating a strike constitute over 50%, can we suppose that majority of all steelworkers favour a strike? (Assume sample is large sufficient and random and representative)
Q2) State magazine once published story saying that farmers lead other groups in consumption of alcohol. As evidence, it pointed to fact that rehabilitation centre located in rural part of state treated more farmers than any other occupational group for alcoholism. Do you agree? Explain why, or why not? Give explanation for your answer (suppose sample is large sufficient and random and representative)
Q3) According to U.S. Bureau of Census Current Construction Report, average price of a new mobile home in western part of United States during 1993 was $40,500. Suppose standard deviation was $8,500. Should mobile home selling for $75,000 be considered outlier? Describe why or why not.
Obtain a test statistic and p -value assuming equal variances. Interpret these results.
A bookcase contains 3 statistics books and 4 biology books. If 2 books are chosen at random, find the chance that both are statistics books.
Random number generation based on discrete distribution and evaluate the average queue length, waiting time, and percentage utilization for each system.
Write down the probability of that the median of the sample or average medians is greater or more than 320 minutes?
In each of the following situations, the sampling frame does not match the population, resulting in undercoverage. Give examples of population members that might have been omitted:
Determine the mean and the standard deviation of the sample.
Find the mean and standard deviation of X, the number of students in class, who will develop influenza.
What is the total amount spent on consumer goods?
Cores on two tests have a bivariate normal distribution; and that correlation of 2 scores is 0.8. Determine the probability that sum of the student's scores on 2 tests will be greater than 200?
A researcher has a series of Likert-scale items and a measure of frequency of absenteeism. He uses each of the Likert-scaled items in a separate bivariate correlation with absenteeism without testing for the assumptions of linear relationships. Is th..
The sample mean is 50, the t-critical value is 1.96, and the standard error of the sample mean is 2.
Draw the OC curve. If the average number of defects increased by to 10 per tractor, what would the probability of detecting the shift in a control chart?
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