The lifetime is months is 85.24 months
Step-by-step explanation:
In this question you are supposed to find the months "X' that is exceeded by 10% of the hard drives.
Exceeded by 10% means a value X on the frequency distribution table that is to the right of the mean score of 75 months showing 10% more.This means exceeding 10% will be months above 0.9 (from 100-90=90%=1-0.9=0.1 as a decimal)
In the standard normal distribution table, look for 0.9, closest value is 0.8997 which gives z=1.2 for y-axis and for x-axis 0.08 to give 1.28
So you have z=1.28, mean μ=75 and δ=8, finding X will gives
You apply the formula;
P(z>X-75/8)
P(z>1.28)=0.1
z=X-μ /δ
1.28=(X-75)/8
8*1.28=X-75
10.24=X-75
10.24+75=X
X=85.24 months
Learn More
Percentile in Normal distribution :brainly.com/question/13700221
Keywords: normally distributed, mean, standard deviation, exceeds
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(0,0) is the origin of a graph, so both W and W' remain at the origin.
The other 3 vertices double in size:
If you multiply all the numbers in X, Y and Z by 2, they become the numbers in X', Y' and Z'.
X(1,2) x 2 = (1*2,2*2) = X'(2,4)
Y(4,2) x 2 = (4*2, 2*2) = Y'(8,4)
Z(3,0) x 2 = (3*2, 0*2) = Z'(6,0)
That means the scale factor is 2
2 rows of 35
7 rows of 10
10 rows of 7
5 rows of 14
14 rows of 5
1 row of 70
6 ROW FORMATIONS POSSIBLE
The other answer provide has a link to it, don’t go on it it’s a scam.
