Two long strips of paper are each 2 inches wide, and they overlap so that the angle between the strips is 30 degrees. What is th
1 answer:
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Answer:
i think IV
Step-by-step explanation:
because of the picture
We are given the following data:
Sample Size = n = 1000
Sample Mean = u = 15 hours
Population Standard Deviation = s = 2 hours
Since we know the population standard deviation, we can use z distribution to find the confidence interval about the mean. z value for 95% confidence interval is 1.96.
Formula for the confidence interval is:
Using the values in the formula, we get:
Therefore, the 95% confidence interval about the population mean is 14.88 hours to 15.12 hours. So B option is the correct answer.