A brand of light bulbs has a mean lifetime of 1,500 hours and a standard deviation of 150 hours. A sample of 100 light bulbs gave a mean lifetime of 1,400 hours. What is the margin of error for the sample?

15

Step-by-step explanation:

Given that:

Mean (μ) = 1500

Standard deviation (σ) = 150

Sample size = 100

Mean (m) = 1400

Margin of Error of sample :

Standard deviation / √sample size

σ / √n

150 / √100

150 / 10

= 15

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.