Consider data for gas mileage of vehicles. If you wanted to reduce fuel consumption, which one of the following three numbers would be the most important to increase the minimum, the median or the maximum? Explain your reasoning.

Explain what an outlier means. What effect might an outlier have on the five-number summary? .

Give some practical examples of data sets that do not appear to be normally distributed. In each case, explain why you do not think the data are normal.

Explain what the percentile score on a standardized exam such as the SAT tells you.

Consider the approximate formula for the sample size in Rule of Thumb 6.3. Assume that we want to sample a population and have a margin of error of 3% for a 95% level of confidence. Does the sample size given by the rule of thumb depend on the size of the overall population from which the sample is taken? In other words, does it matter whether the population is 1 million or 100 million? Does your answer agree with what your intuition would suggest? Explain