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1 - Using your workplace, present or prior, or an organization with which you are affiliated, identify a dependent variable and an independent variable of interest to you; gather a small data set for each of the variables; enter the data into Minitab; run the simple linear regression in Minitab, and interpret the regression output.
2 - Choose a data set from the zip file, use regression to determine the potential linear relationship between two of the quantitative variables. Tell which data set you used, what the variables are, what they mean, and what the regression line tells you. What does the p-value for the slope tell you about the relationship?
Data provided;
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A car insurance compancy has recorded the number of claims for the past quarter by age and gender. The information is recorded below.
We are interested in testing to find out whether the variance of the population is vitally more than 0.003
Which test do we use to see if the difference in our sample is statistically significant? Why? Should it be one or two-tailed?
In what sense is this business problem? A societal problem? An individual problem?
It has been reported that the average US office worker receives 14 fax messages per day. For purposes of this exercise, we will assume that the daily number of fax messages is normally distributed with a standard deviation of 5.0 messages.
Compare BSN students who have lecture to those who do not receive lecture on safety. Compare ASN students who have lecture to those who do not receive lecture on safety
The researcher in exercise decides to conduct the same study using a within - participates design to control for differences in cognitive ability.
Taking α to be 0.05, what is/are the critical values associated with testing your hypothesis?
Describe the relevant population and the source (e.g. newspaper, TV, radio, internet, etc.). Explain why you do not believe it is accurate.
A study published in the New England Journal of Medicine (Aug. 2001) suggests that it's dangerous to enter a hospital on a weekend. During a 10-year period, researchers tracked over 4 million emergency admissions to hospitals in Ontario, Canada. T..
If the decision in the hypothesis test of population correlation is to reject the null hypothesis, what can we conclude about the population correlation.
Assume we have a population of scores with mean (mu) of 200 and standard deviation (sigma) of 10. Assume that the distribution is normal. Provide answers to the following questions:
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