Answer:
135 to 143 minutes.
Step-by-step explanation:
Standard deviation (s) = 22.6 minutes
Sample size (n) = 123
Sample average (X) = 139 minutes
The lower and upper bounds of a confidence interval are given by:
Lower bound:
Upper bound:
For a confidence interval of 95%, the z-score value is 1.96.
Therefore, the 95% confidence interval for the mean surgery time is:
Lower bound:
Upper bound:
The 95% confidence interval is 135 to 143 minutes.
Step-by-step explanation:
AM switches to PM at 12 PM.
so, we need to calculate the time from 9:23 am to 12 pm, and then from 12 pm to 2:06 pm, and then add both for the overall answer.
the first full hour after 9:23 am is 10 am. from there it is 2 hours to 12 pm.
how many minutes from 23 minutes to 60 (of the next full hour) ? 60 - 23 = 37 minutes.
so, it is 2 hours and 37 minutes until 12 pm.
and from 12 pm to 2:06 pm it is 2 hours and 6 minutes.
the total time is then
2 hours 37 minutes + 2 hours 6 minutes =
= 2 + 2 hours 37 + 6 minutes = 4 hours 43 minutes
FYI
if the sum of the minutes would have been larger than 60 (like e.g. 53 + 12), then we would have had to add another hour as a carry over, and take the remainder of minutes/60 as minutes.
e.g.
2 hours 53 minutes
3 hours 12 minutes
would sum up to
5 hours 65 minutes = 6 hours 5 minutes
First off simplify your mixed number and and create that in to a precentage
Answer:
22
Step-by-step explanation:
<h2>
—Math</h2>
√(x+3) –4 = 1
√(x+3) = 1 +4
√(x+3) = 5
x + 3 = 5²
x = 25 –3
x = 22