Answer:
you kinda cute ngl...
Step-by-step explanation:
The answer is 6.5 - you add 6 and 7 together and then you divide them by two
I'd he happy to, But you forgot to post the question.
At 95% confidence interval, the z score is 1.96. Using the
formula:
Confidence Interval = x ± z s / sqrt (n)
where x is the average time served, s is standard deviation
and n is number of samples
Confidence interval = 7.5 ± (1.96 * 3) / sqrt (400)
Confidence interval = 7.5 ± 0.294
<span>Confidence interval = 7.206 to 7.794</span>