σ = 20,48% above 150; μ = ?
A)72
B)149
C)14.9
D)0.48
E)0.05

Question

Quizplus · Accepted Answer

Since the standard deviation (σ) is 20.48% above 150, we can use the formula:

σ = (x - μ)/μ

where x is the value 20.48% above 150, or 181.2.

Plugging in the values:

20.48% = (181.2 - μ)/μ

Multiplying both sides by μ:

0.2048μ = 181.2 - μ

Adding μ to both sides:

1.2048μ = 181.2

Dividing by 1.2048:

μ = 149.99 or approximately 150

Therefore, the best choice is B, 149.

σ = 20,48% Above 150; μ =