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Consider the 3×2 contingency table below:
Factor B
Factor A
B1
B2
A1
16
14
A2
15
25
A3
9
21
At significance levels of .05 and .01 test H0: the factors A and B are independent.
Compute lower and upper quartiles of log10-balances? Determine 95% range of the balances in $s? Express in English what the two boundaries mean.
Evaluate the difference in the mean ratings and find the standard deviation of the difference in the ratings, what is the chance both children are boys?
Researcher is interested in testing whether there are differences in mean between population one and population two.
Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.
A researcher was interested in determining whether incentives affect the response rate in surveys. A simple random sample of 50 adult residents of a large city was selected. All were mailed a survey and promised a check upon returning a completed ..
A fair coin was flipped three times and landed heads three times. What is the probability of a head on the next toss?
1st a confidence interval is constructed without utilizing the finite population correction factor.
Based on the scatter diagram, does there appear to be any relationship between the number of assemblers and production? Explain.
Describe the given data show a seasonal effect using moving average method. Describe the data which show a seasonal effect.
The article claims that the distributions of annual returns for both common stocks and long-term government bonds are bell-shaped and approximately symmetric. Assume that these distributions are distributed as normal random variables with the mea..
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?
Assuming that the Poisson distribution is a plausible model in describing variability of asbestos fiber counts in filters; derive a 95% confidence interval indicating the variability in the average number in asbestos fibers.
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