Question

Question 11 of 12, Step 1 of 1 7/12 Correct The Arc Electronic Company had an income of 95 million dollars last year. Suppose the mean income of firms in the same industry as Arc for a year is 75 million dollars with a standard deviation of 17 million dollars. If incomes for this industry are distributed normally, what is the probability that a randomly selected firm will earn more than Arc did last year? Round your answer to four decimal places. Tables Keypad Answer 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 - Normal Table -- to Z Submit Answer

Answer 1

Solution: Given that x = 95, mean = 75, sd = 17

P(X > 95) = P((X-mean)/sd > (95-75)/17)
= P(Z > 1.1765)
= 0.1190