Which expression is represented by the diagram? ( Marked 1-4, I can't paste the question.)
1 answer:
You might be interested in
Answer:
3.49 < u < 4.37
Step-by-step explanation:
Data provided
3.6, 3.1, 4.0, 4.9, 3.0, 4.3, 3.6, 4.6, 4.6, 4.0, 4.4, 3.6, 3.3, 4.2, 3.7
The sample mean and deviation can be calculated with the following formulas
represent the sample mean
population mean
s=0.574 represent the sample standard deviation
n=15 represent the sample size
Confidence interval
The confidence interval for the true mean is given by:
(1)
The degrees of freedom, given by:
The Confidence is 0.99 or 99%, the significance is and
, and the critical value would be
Replacing we got:
3.49 < u < 4.37