Just switch the x and the 3
Answer: Its B!!!
Step-by-step explanation:
A) The empirical rule tells you the probability of being within 1 standard deviation of the mean is 68%.
b) The probability that the sample mean falls within 3 standard deviations* of the mean is 99.7%.
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* The standard deviation of the sample mean is 1/√9 = 1/3 of the standard deviation of an individual sample. Hence the same limits (90-110) now cover 3 standard deviations of the sample mean.
Answer:
$31.50 profit
Step-by-step explanation:
By subtracting 30% of 45 from 45, we are left with $31.50.