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Compute a 95% confidence interval for the population mean, based on the sample 10, 12, 13, 14, 15, 16, and 49. Change the number from 49 to 16 and recalculate the confidence interval. Using the results, describe the effect of an outlier or extreme value on the confidence interval.
What are the two ways of testing a correlation coefficient for significance?
Given the following data on hotel check-ins for a 6-month period:
Using the simple test of independence (described in the lecture), decide if the events high calorie and high fiber are independent or dependent. Show your work.
Compute the probability that debt for a randomly selected borrower with good credit is more than $18,000?
Compute β-error of test in part (a) if true difference in mean burning rate is 2.5 centimeters per second.
The probability of obtaining a random sample mean, which is lower than the population mean, is:
Perform a posthoc test that is suitable if we assume that group 7 is a control group and that the other are different treatment groups and that we are only interested in finding significant treatments, not to compare them.
Then use ogive to estimate median and first and third quartiles. Also utilize it to reply following question: What percent of 60 mutual fund loads are less than 75.
Compute mean x and standard deviation s of data above. Calculate Ho by using traditional/classical method.
Suppose that the results of the sample lead to rejection of the null hypothesis. Classify that conclusion as a:
2 to every even-numbered card, with aces being 1s. Determine the frequencies of 0, 1, and 2. Use SPSS to get the value of test statistic and p-value.
Internal study by Technology Services department at Lahey Electronics disclosed company employees get the average of 2 emails per hour. Suppose arrival of these emails is approximated by Poisson distribution.
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