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Hypothesis Testing:
The director of admissions at the University of Maryland, University College is concerned about the high cost of textbooks for the students each semester. A sample of 25 students enrolled in the university indicates that X (bar) = $315.4 and s = $43.20.
Using the 0.10 level of significance, is there evidence that the population mean is above $300?
What advantage does correlation have over a cross-tab?
Explain clearly, in your own words, what is a Type I error in this context.
What was the highest score earned on the exam? According to Chebyshev's Theorem, how many students scored between 42 and 74?
A normal distribution with a mean of 55 and a standard deviation of 6 is evaluated to solve a business problem.
Assuming we can verify that the data set is approximately normally distributed, what percentage of times will the server be down less than 24 minutes?
Determine the value of correlation coefficient between these 2 variables?
We are interested in testing to see if the variance of a population is less than 7. The correct null hypothesis is:
Evaluate the mean wait time and throughput rate
We are interested in determining whether or not the opinions of the individuals (as to Yes, No, and No Opinion) are uniformly distributed.
Determine the class with the greatest number of data values.
Carry out suitable multiple comparison procedure to determine the source of the difference.
For value 10,40,20,50 and 40, value of arithmetic mean is? Simplest measure of dispersion is the Standard deviation, variance, Quartile deviation.
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