The expected value of an accountant's profit and loss analysis is 0. Explain what this means. Choose the correct answer below. O A. An expected value of 0 means that there was not any money gained or spent. B. An expected value cannot be equal to 0. OC. Since the expected value cannot be less than 0, an expected value of 0 means that the average money gained is equal to or less than the average money spent. OD. An expected value of 0 means that the average money gained is equal to the average money spent, representing the break-even point.

Sam took 4 courses last semester: Spanish, Physics, Biology, and Calculus. The means and standard deviations for the final exams, and Sam's scores are given in the table below. Convert Sam's score into z scores.   Subject Mean Stand. dev. Sam's score Sam's z score Spanish 44 12 47   Physics 60 14 84.5   Biology 77 10 82   Calculus 70 12 79   On what exam did Sam have the highest relative score?(Enter the subject.) In the Biology class, there was a student with a z-score of 1.2. What score did that student earn on the exam?

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A sample of n = 10 scores has a mean of 20.  A person with a score of 1 is replaced with a person who has a score of 31.  Find the new mean. a.31 b.17 c.21 d.23