In the accompanying diagram, the shaded area represents approximately 95% of the scores on a standardized test. These scores range from 78 to 92. 17. What is the mean? Show your work or explain how you found this answer.
18. What is the standard deviation? Explain or show your work.

In a probability experiment, karen flipped a coin 76 times. the coin landed on heads 32 times. what percentage of the coin flips resulted in tails? round to the nearest percent. a. 58% b. 65% c. 42% d. 60%

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?

What are the first 4 terms in the multiplication pattern given by the formula 2×4n