The mean ( average ) is given as 1200 hours.
The standard deviation is 200, sample size is 100.
Find the standard error:
√(200^2 / 100) = 20
Now calculate the confidence interval. For 95% the Z number is 1.96
Multiply Z by the standard error:
1.96 x 20 =39.2
Now find the range that the mean should be within:
1200 - 39.2 = 1160.8
1200 + 39.2 = 1239.2
The samples should be between 1160.8 and 1239.2 for a 95% confidence interval.
Since the average was 1050, which is below 1160.8 the bulbs are not in compliance.
Answer:
-8a -8b + 8c
Step-by-step explanation:
-8(a + b - c)
-8 x a is -8a
-8 x b is -8b
-8 x -c is 8c
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<u>-8a -8b + 8c</u>
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I Hope That This Helps! :)
Just substitute the value of x from equation 2 in equation 1,
6y = x - 12
6y = 22 - 12
y= 10/6
y = 5/3
In short, Your Answer would be Option Option B) (22, 5/3)
Hope this helps!
Answer:
30 out of 40: 75%
40 out of 50: 80%
40 out of 50 is the better score
Her new balance is her new balance would be 435
heres my math
750-150-135=435