How many solutions does x2 = 9 have?
2 answers:
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Try this:
Answer:
So on this case the 95% confidence interval would be given by (155.301;159.299)
And the best option would be:
B. (155.3, 159,3)
Step-by-step explanation:
Information given
represent the sample mean
population mean (variable of interest)
represent the population standard deviation
n=234 represent the sample size
Confidence interval
The confidence interval for the mean is given by the following formula:
(1)
The Confidence level is is 0.95 or 95%, the significance is and
, the critical value for this case would be
And replacing we got:
So on this case the 95% confidence interval would be given by (155.301;159.299)
And the best option would be:
B. (155.3, 159,3)