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
Answer:
D
Step-by-step explanation:
-4 * -6 is -34
add 2 and you have -24
Answer:
x = √2, y = 2
Step-by-step explanation:
You know that the sides of an isosceles right triangle are equal in length, so ...
x = √2 . . . . same as the given side
You also know that the hypotenuse is √2 times as long as one side, so ...
y = √2·√2
y = 2