Using the z-distribution, the 95% confidence interval of the population mean is: (17.5, 24.5).
<h3>What is a z-distribution confidence interval?</h3>
The confidence interval is:
In which:
is the sample mean.
is the standard deviation for the population.
In this problem, we have a 95% confidence level, hence
, z is the value of Z that has a p-value of 
, so the critical value is z = 1.96.
For this problem, the other parameters are:
Hence the bounds of the interval are:
The interval is: (17.5, 24.5).
More can be learned about the z-distribution at brainly.com/question/25890103
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8-3=5 f(x)=5
x=1
the answer is 5
For triangles Sum of any Two sides should be always more than the length of the Third side.
A) 2cm,8cm,8cm
8+8=16 >2 True
8+2=10 >8, True
8+2=10 >8, True
B) 2cm,3cm,6cm
2+3=5 > 6 False. It is impossible in a triangle.
3+6=9 > 2 True
2+6=8 >3 True
The answer is B.
Answer:
z-score is calculated by:
z = (value - mean)/std
= (4100 - 3550)/870
= 0.632
=> Option B is correct.
Hope this helps!
:)
