A 5-column table has 4 rows. The first column has entries A, B, C, Total. The second column is labeled X with entries 45, 20, 25
2 answers:
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Answer:
The 95% confidence interval would be given by (0.0772;0.1308)
Step-by-step explanation:
For this case we can calculate the estimated proportion like this:
We can assume that the normal model can be used since we satisfy two conditions:
The confidence level for this case is 95% of confidence, and the significance is given by and
. And the critical value would be given by:
The confidence interval for the mean is given by the following formula:
Replacing the values we got:
The 95% confidence interval would be given by (0.0772;0.1308)