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(c)Use the defining formula to compute the population standard deviation σ. (Enter a number. Round your answer to two decimal places.)
9. 7.69/7.69 Are data at the nominal level of measurement quantitative or qualitative?10. 7.69/7.69 How do college professors spend their time? The National Education Association Almanac of Higher Educationgives the following average distribution of professional time allocation: teaching, 43%; research, 16%; professional growth, 9%; community service, 11%; service to the college, 11%; and consulting outside the college, 10%. Make a pie chart showing the allocation of professional time for college professors. (Select the correct graph.)
11. 4.63/7.69 How much should a healthy Shetland pony weigh? Let xbe the age of the pony (in months), and let ybe the average weight of the pony (in kilograms).x36121622y6095140150187(a)Make a scatter diagram of the data and visualize the line you think best fits the data. (Submit a file with a maximum size of 1 MB.)(b)Would you say the correlation is low, moderate, or strong?Would you say the correlation is positive or negative?
Σ(x .Compute r. (Enter a number. Round your answer to three decimal places.)As xincreases from 3 to 22 months, does the value of rimply that yshould tend to increase or decrease? Explain your answer.12. 7.69/7.69 Find the mean, median, and mode of the data set.8 2 7 2 3mean (Enter a number.) 4.4 median (Enter an exact number.) mode (Enter an exact number.) 3 2 13. 7.69/7.69 Categorize these measurements associated with student life according to level: nominal, ordinal, interval, or ratio.
nominalordinal intervalratio(d)Course evaluation scale: poor, acceptable, goodnominalordinal intervalratio(e)Score on last exam (based on 100 possible points)nominalordinal intervalratio(f)Age of studentnominalordinal intervalratio