O Turn in Test Pause Test Practice Final Exam NATALIE HARRISON Question 12of 15

Question

O Turn in Test Pause Test Practice Final Exam NATALIE HARRISON Question 12of 15 Step 1 of 1 12:56:56 The weights of steers in a herd are distributed normally. The standard deviation is 200 lbs and the mean steer weight is 900 Ibs. Find the probability that the weight of a randomly selected steer is between 1060 and 1139 lbs. Round your answer to four decimal places. Answer 2 Points Keypad | | E Tables If you would like to look up the value in a table, select the table you want to view, then either click the cell at the intersection of the row and column or use the arrow keys to find the appropriate cell in the table and select it using the Space key. Normal Table-to-z Normal Table -o to z Next Prev

Explanation / Answer

Ans:

mean=900

standard deviation=200

z(1060)=(1060-900)/200=160/200=0.8

z(1139)=(1139-900)/200=239/200=1.195

P(0.8<=z<=1.195)=P(z<=1.195)-P(z<=0.8)=0.8840-0.7881=0.0958

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