Def. of Geometric Mean: the nth root of the product of n numbers
The geometric mean of 7 and 11 =
(approximated)
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Answer:
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Step-by-step explanation:
This is what I got and I am sure this the answer
Answer:
the number is 65
Step-by-step explanation:
the same number is added. so let the number be 'x'
the equation can hence be written as:
15 + x / 31 + x = 5 / 6
(now cross multiply)
6 (15 + x) = 5 (31 + x)
90 + 6x = 155 + 5x
6x - 5x = 155 - 90
x = 65
You need to know the distribution's mean and standard deviation.

Transforming to the standard normal distribution, and letting

denote the standard deviation,

The z-score corresponding to this probability is approximately

, so you have