Where is the model on the question ?
The mean = 2,000
s = Sigma ( standard deviation ) = 300
M - 2 s = 2,000- 2 * 300 = 2,000 - 600 = 1,400
M + 2 s = 2,000 + 2 * 300 = 2,000 + 600 = 2,600
Answer.
Useful life of light bulbs within 2 standard deviations of the mean is:
A ) Between 1,400 and 2,600 hours
The answer is 75 % you just have to divide 84 and 112 and u get 75%
Answer:
-1
Step-by-step explanation:
Photomath
I am pretty sure it is -8 but someone else should confirm my answer.
