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Provide examples of a different data collection method and a data collection instrument used in managerial research. Why is it important to ensure that these data collection methods and instruments are both reliable and valid?
Create the 90% confidence interval for mean score of all such subjects. You may suppose scores are usually distributed.
The number of widgets produced by 9 employees in an eight hour shift is recorded as: 135, 120, 116, 119, 121, 125, 135, 131, 123. What is the median of the number of widgets produced presented above?
At α = .01, did yellow fire trucks have a considerably lower accident rate? Determine sample proportions and z test statistic.
What's the expected value of sample information? How much might the physicians be willing to pay for a market study?
The mean of a sample is 22.5. The mean of 1000 bootstrapped samples is 22.491. The bias of the bootstrap mean is
A manufacturer claims that the life span of its tires is 52,000 miles. You work for a consumer protection agency and you are testing these tires. Assume the life spans of the tires are normally distributed.
You calculate the difference in income as (after incentive plan - before incentive plan). You want to test whether income after the incentive plan is different from income before the incentive plan. What are the hypotheses for this test?
There are 4000 mangoes in a shipment. It is found that it a mean weight of 15 ounces with a standard deviation of 2 ounces.
Professor wishes to determine whether prior statistical knowledge assists students in their performance on the final exam. What is the relationship between pretest scores and final exam scores after controlling for cumulative GPA. What SPSS test w..
Using equation presented calculate SST,SSE and SSr. Determine least squares regression line for this data.
For each of the F statistics given above find the degrees of freedom and an approximate P-value. Summarize the results of these tests.
If random sample of size n = 16 are selected, can we say anything about the xbar distribution of sample means?
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