The amount of heat from Thor’s ray gun has a mean of 90 kCal per blast and a sta

Question

The amount of heat from Thor’s ray gun has a mean of 90 kCal per blast and a standard deviation of 7 kCal per blast. If he shoots his ray gun 15 times, what is the approximate probability that the total amount of heat emitted will be less than 1290 kCal? The amount of heat from Thor’s ray gun has a mean of 90 kCal per blast and a standard deviation of 7 kCal per blast. If he shoots his ray gun 15 times, what is the approximate probability that the total amount of heat emitted will be less than 1290 kCal?

Explanation / Answer

mean of 90 kCal

standard deviation of 7 kCal

n = 15

P(X < 1290)

1290/15 = 86

z = (86 - 90)/7

z = - 0.57

P = 0.2843

z =

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