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Steps in hypothesis test procedure.
Provide an outline of the sequence of steps that would take when conducting a hypothesis test for some general statistic, ? say.
Describe the types of decisions that do not involve uncertainty and risk and common approaches used for analyzying them.
Does a regression model imply causation? Why or why not? Provide an example which provides and independent and dependent variable from your place of work.
A social psychologist has developed a test measure gregariousness. The test is normed so that it has a mean of 70 and a standard deviation of 20, and the gregariousness scores are normally distributed in the population of college students used to ..
Discuss whether this variable should be placed in the model as an ordinary quantitative variable or by means of four 0, 1 indicator variables.
Suppose that the average number of years to graduate at a university is 4 years, with a standard deviation of 0.5 years. From the Empirical Rule, what is a range of values that 95% of the students should graduate between?
Find the 93% confidence interval of the true mean. If a day care center were starting up and wanted to keep tuition low, what would be a reasonable amount to charge?
Based on these results, is there significant difference between attitudes for males and for females? Use two tailed test with alpha = .05.
In a simple random sample of 30 days, what is the probability that the mean number of daily emergency admissions is between 75 and 95?
Explain how the marketing analyst can use independent samples to collect the data.
The manager of Sam's Food Mart guarantees that none of his cartons containing a dozen eggs will contain more than one bad egg, despite the fact that 4% of individual eggs are known to be bad. Define the random variable x to be the number of bad eg..
The reason why we finish our calculation by dividing range by 4 is that in most data sets 95% of the data values fall within two standard deviations of the mean.
Medium-sized college town were surveyed, and it was found that 110 were regular voters. Estimate the true proportion of regular voters with 90% confidence and comment on your results.
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