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Based on a large national sample of working adults, the U.S. Census Bureau reports the following information on travel time to work for those who do not work at home: lower quartile = 7 minutes median = 18 minutes upper quartile = 31 minutes Also given was the mean travel time, which was reported as 22.4 minutes.
a. Is the travel time distribution more likely to be approximately symmetric, positively skewed, or negatively skewed? Explain your reasoning based on the given summary quantities.
b. Suppose that the minimum travel time was 1 minute and that the maximum travel time in the sample was 205 minutes. Construct a skeletal boxplot for the travel time data.
c. Were there any mild or extreme outliers in the data set? How can you tell?
Briefly state the evaluation criteria for using a computed regression equation; specifically, comment on the coefficient of determination, correlation coefficient, and standard error of the estimate.
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If the first head occurs on the first toss, you win $1. If the first head occurs on toss 2 or on toss 3 you win $2 or $3, respectively. If no heads appear, you lose $1 (that is, win -$1). Find the joint probability function for Y1 and Y2.
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the acceptable level for insect filth in a certain food item is 4 insect fragments per 10 grams. a sample random of 50
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