rebobiley and an o or uiz 13 arma MATH 1200 Quiz 13 Quiz Rebekah Kelly: Attempt

Question

rebobiley and an o or uiz 13 arma MATH 1200 Quiz 13 Quiz Rebekah Kelly: Attempt 2 Save Question 5 (0.9 points) Electricity bills in a certain aty have mean $ 111.64. Assume the bills are normally distributed with standard deviation 11.26. Find the value that separates the lower 34 % of the balls from the rest. Write only a number as your answer Round to two decimal places (for example: 42.81). Do not write any units. Your Answer: Answer Save Question 6 (0.9 points) A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final

Explanation / Answer

P( X < x) = 0.34

Or, P((X - mean)/sd < (x - 111.64)/11.26) = 0.34

Or, P(Z <  (x - 111.64)/11.26) = 0.34

Or,  (x - 111.64)/11.26 = -0.41

Or, x = -0.41 * 11.26 + 111.64

Or, x = 107.0234

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