Answer:
The 99% confidence interval for the mean commute time of all commuters in Washington D.C. area is (22.35, 33.59).
Step-by-step explanation:
The (1 - <em>α</em>) % confidence interval for population mean (<em>μ</em>) is:

Here the population standard deviation (σ) is not provided. So the confidence interval would be computed using the <em>t</em>-distribution.
The (1 - <em>α</em>) % confidence interval for population mean (<em>μ</em>) using the <em>t</em>-distribution is:

Given:

*Use the <em>t</em>-table for the critical value.
Compute the 99% confidence interval as follows:

Thus, the 99% confidence interval for the mean commute time of all commuters in Washington D.C. area is (22.35, 33.59).
<7 and <10 are each 84 degrees
Answer:
B im almost 100% sure, the 3 is where it starts on the Y axis so its based off the 2x which goes up 2 over to the right one, if it goes on a downward slope like the bottom two then that means its a negative equation.
Answer:

Explanation:
Combining the fractions, we have:
Answer:
sum like 99 becuz isz ur safest bet to get it right