Qualitative-quantitative-discrete and continuous variables
Explain the difference between qualitative, quantitative, discrete, and continuous variables.
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How large a sample should be so that we can assert with 95% confidence that the margin of error of the estimation is less than 3%?
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Suppose we have a population of scores with a mean (µ) of 975 and a standard deviation (s) of 15. What percentage of the population will lie between 960 and 990?
A researcher has reason to believe that, for an experiment with 50 points, a 95% prediction interval would be of width 8. If the researcher wishes to run a more precise experiment that will result in a 95% prediction interval of width 4, then the
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