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:
Step-by-step explanation:
Radius is <u>1/2</u> of the diameter
or
Diameter is <u>2</u> of the radius
Answer:
y = -7/2 + 5x/2
t = 3k/v
f = 9c/5 +32
Step-by-step explanation:
Answer:
i think its 54. i might be incorrect.
Step-by-step explanation:
Answer:
6 Hours
Step-by-step explanation:
17,100 - 6,300= 10,800
10,800/1,800 = 6
