The answer to this question would be the second option. It’s not happyness but it is happiness. :)
Answer:
line 1 and 2 I think sorry if I'm wrong
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.
The result of the given expression is -6
<h3>Solving expressions</h3>
Given the expression below
−3/2⋅4⋅1/2(10−8)
Expand to have;
-3/2 * 4 * 1/2(2)
-3/2 * 4 * 1
-3/2 * 4
This is expressed as;
-12/2
-6
Hence the result of the given expression is -6
Learn more on equation here:brainly.com/question/2972832
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There would be 63 old houses because 28/63 is the same as 4/9