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List at least three quantitative and at least three qualitative variables that you encounter in your daily lives. Label each one of your variables as the level of measurement (nominal, ordinal, interval or ration).
Summarize the similarities and differences in their performance so far.- The coach can take only one player to the state championship. Which one should she take? Why?
A corporation monitors time spent by office workers browsing the web on their computers instead of working. In a sample of computer records of 50 workers.
A computer password consists of four characters. The characters can be one of the 26 letters of the alphabet. Each character may be used more than once. How many different passwords are possible?
The width of an interval is half of the difference between its upper and lower bounds. The width is a measure of the uncertainty of the number specified by the interval.
After performing a two sample t-test, you see a p-value of 0.0355. Of the following, which is the appropriate conclusion?
Find the equivalent Z score, the percentage of the area above the score, and the percentage of the area below the score.
Five children under twelve are selected at random. The probability that the average number of hours that they spend each week watching television is at least 30 is about?
Use the level and power values for the paired t test and Wilcoxon signed-rank test given in Table 6.18 to answer the following questions:
Which of the following exam scores should lead to the better grade?
A manufacturer examines its records over the last year on a component part received from outside suppliers. The breakdown on source (supplier A, supplier B).
Braking distances of cars. A random sample of 13 four-cylinder cars is obtained and braking distances are measured and found to have a mean of 137.5 ft. and a standard deviation of 5.8 ft.
Which of the following descriptions of confidence intervals is correct? (Select all that apply). When conducting a hypothesis test, which one of the following p-values would you feel most confident to reject the null hypothesis
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