uestion 8 (1 point)
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It is believed that using a solid state drive (SSD) in a computer results in faster boot times when compared to a computer with a traditional hard disk (HDD). You sample a group of computers and use the sample statistics to calculate a 95% confidence interval of (3.83, 12.85). This interval estimates the difference of (average boot time (HDD)  average boot time (SSD)). What can we conclude from this interval?
Question 8 options:









Correct option:
(3) We are 95% confident that the average boot time of all computers with an HDD is greater than the average of all computers with an SDD.
EXPLANATION:
We note that all the values in the confidence interval are
positive. The confidence interval estimates the difference of
average boot time HDD  average boot time SDD. So, we are 95%
confident that the average boot time of all computers with an HDD
is greater than the average of all computers with an
SDD.
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