Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. The results in the screen disp
lay are based on a 95% confidence level. Write a statement that correctly interprets the confidence interval. TInterval (13.046,22.15) x overbarequals17.598 Sxequals16.01712719 nequals50 Choose the correct answer below. A. We have 95% confidence that the limits of 13.05 Mbps and 22.15 Mbps contain the true value of the mean of the population of all data speeds at the airports. B. We have 95% confidence that the limits of 13.05 Mbps and 22.15 Mbps contain the sample mean of the data speeds at the airports. C. The limits of 13.05 Mbps and 22.15 Mbps contain the true value of the mean of the population of all data speeds at the airports. D. The limits of 13.05 Mbps and 22.15 Mbps contain 95% of all of the data speeds at the airports.
A confidence interval tells us within some level of certainty (in this case, we are 95% certain) that the true mean of the internet speed at the airport is somewhere in the range of 13.04mbps and 22.15mbps. We can't say where it is in that range, and we're only 95% confidence, so there's a 5% chance we are wrong and the mean is not in that range. It could be higher or lower.
-|-10|-(-10) A negative outside of the “ | “ means that one number inside will be negative . -10-(-10) An imaginary | will “appear” in between the two negative signs or it will turn into an addition sign.
-10+10 A positive subtracts negatives from the negative number. The answer is 0
