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In your biology class, your final grade is based on several…

In your biology class, your final grade is based on several things: a lab score, score on two major tests, and your score on the final exam. There are 100 points available for each score. However, the lab score is worth 30% of your total grade, each major test is worth 22.5%, and the final exam is worth 25%. Compute the weighted average for the following scores: 92 on the lab, 85 on the first major test, 90 on the second major test, and 84 on the final exam. Round your answer to the nearest hundredth.

First time Mary took several quizzes, she received the follo…

First time Mary took several quizzes, she received the following scores:  ​ 4, 6, 6, 6, 7, 7, 8, 9, 9, 10 ​ The median for the data set is 7. A score of 6 occurs more frequently than the other values, 6 is the mode. The mean is 7.2. Then Mary took the same tests a second time and she made a mistake that resulted in a score of zero on the first quiz. The other results were the same. What value does receiving a zero on the first quiz during the second attempt affect significantly: the median, the mode, or the mean?  

Suppose automobile insurance companies gave annual premiums…

Suppose automobile insurance companies gave annual premiums for top-rated companies in several states. The figure below shows box plots for the annual premium for urban customers in three states.    Which state offers the lowest premium? Which state offers the highest premium?