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Construct a Scatterplot of the raw data. Then, run the Correlation/Regression program.
Costs of Television: Listed below are prices (in dollars) and quality rating scores of rear-projection televisions. All of the televisions have screen sizes of 55 or 56 inches. Is there sufficient evidence to conclude that there is a linear correlation between the price and the quality rating score of rear-projection televisions? Does it appear that as the price increases, the quality score also increases? Do the results suggest that as you pay more, you get better quality?
Price 2300 1800 2500 2700 2000 1700 1500 2700
Quality 74 73 70 66 63 62 52 68
Identify the correlation coefficient: r = __________
Identify the CV at alpha = 0.05: __________
Is there significant linear correlation?: ________
How do you know? ____________________________
Suppose a student received the following grades for the semester: History, B; Statistics, A; Spanish, C; and English, C. History and English are 5 credit hour courses
At the .05 significance level, can we conclude that the guideline is still reasonable?
If the loss of weight of customers at the end of their first month is normally distributed with a mean of 6.7lbs and a standard deviation of 0.81lbs
When we carry out a goodness of fit chi-square test, the expected frequencies are based on the alternative hypothesis
Many people attend work and produce little or nothing of value that is why they are terminated.
Explain the differences between longitudinal and cross sectional business research studies. Which two types of probability sampling are best suited for business research and statistical data analysis, and why?
Compare his performance on the two tests in terms of percentile ranks. In which exam did he do better? Please show computations and discuss.
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
Part 1. What is the appropriate distribution for such data? Part 2. Is this lot anomalous?
Are there any formulas or graphs for Correlational statistical procedures and Quantative research methods? I'm writing a paper and would like to throw in a few examples with explanation.
Compare and contrast internal and external validity. Describe and give examples of research questions for which external validity is a primary concern.
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
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