wh e wish to display the distribution of letter grades (A, B, C, D, F) among stu
ID: 3323716 • Letter: W
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wh e wish to display the distribution of letter grades (A, B, C, D, F) among students in a course, the following graphs is best suited to this purpose? B) pie chant D) boxplot A) histogram C) stem-and-leaf plot 23. A study of recent college graduates records the sex and total college debt in dollars for 10,000 people a year after graduation. A) Sex and college debt are both categorical variables. B) Sex and college debt are both quantitative variabl C) Sex is a quantitative variable and college debt is a categorical variable. D) Sex is a categorical variable and college debt is a quantitative variable. 24. If a distribution is skewed to the left, A) The mean is less than the median. B) The mean is the same as the median. D) The mean and the median do not exist. C) The mean is more than the median. 25. Which of the following is least affected by an extreme high outlier? A) Mean B) Median D) Standard Error C) Standard Deviation 26. Which of these variables is least likely to have a Normal distribution? A) Heights of 100 white pine cone trees in a forest. B) Lengths of 50 newly hatched pythons. C) Head circumference of 60 newborn babies. D) Income per person for 150 different countries. 27. The scores of adults on an IQ test are Normally distributed with mean of 100 and standard deviation of what is the range of the middle 68% of adults on this IQ test? B) 70 to 130 D) 75 to 125 15, A) 85 to 115 C)55 to 145 28. A retail outlet has recorded temperature and number of sweaters sold per day and has found that there is a correlation. Which value of R is most reasonable? A)R--1 C)R-0.8 B)R=-0.4 D) R=1 29. Gallup polling contacts 1161 U.S. adults and asks them "Which political party do you think has better ideas for leading this country in the twenty-first century?" In all, 696 of the 1161 responded with, "The Democrats." The sample in this setting is A) All 235 million adults in the U.S. C) The 696 people who chose the Democrats. D) The 465 people who chose a different party. B) 1161 U. S. adults. 30, The population in the setting from problem #29 is A) All 235 million adults in the U.S ) The 696 people who chose the Democrats. D) The 465 people who chose a different party. B) 1161 U. S. adults.Explanation / Answer
22 ) A ) Histogram
23 ) D ) Sex is a categorical variable and college debt is a quantitative variable .
24 ) A ) Mean is less than the median
25 ) B ) Median
26 ) A ) Heights of 100 white pine cone trees in a forest .
27 ) A ) 85 to 115
28 ) B ) R = - 0.4
29 ) B ) 1161 US adults
30 ) A ) All 235 million adults in the US .
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