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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 this ethical?
Two letters are chosen at random without replacement from word statistical. Determine the probability that both letters are s?
A coin is flipped e times and heads (h) or tails (t) are recorded:
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
Develop a 99 percent confidence interval for the population proportion.
Draw the suitable 2x2 table, compute and interpret suitable measure of association.
Determine percentage of employees has 5 dependents? Of all employees which have at least one dependent, determine percentage has more than one?
Change the frequencies to percentages - is there a group more likely to get high salaries.
The mean amount of time a (unnamed) computer server is down is 18.3 minutes with a standard deviation of 5.7 minutes.
A researcher used stepwise regression to create regression models to predict Birth-Rate (births per1000) using five predictors:
Describe the factors that might cause variation in weight of Tootsie Rolls during manufacture.
Does this sample indicate a smaller average? Use α = 0.05 and assume a normally distributed population.
Explain the strength of relationship between the assets?
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