What is the expected value of answering a 4 options multiple-choice question? What is the expected value if you answer 8 of this kind of questions? If you answered the question correctly, you earn 4 points. If you did not answer the question correctly, you lose 2 points.

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?

Select the correct answer. employee earnings per month($) 1 1,200 2 2,600 3 1,800 4 1,450 5 3,500 6 2,800 7 12,500 8 3,200 which measure of spread is best for the data in the table? a. range b. quartiles c. interquartile range d. mean absolute deviation