Since we are rounding to the nearest inch, we want to look at the tenths place. The rule for rounding is 5 and up, we round up, 4 and below, stay. Since 3 is below 5, we stay. Therefore your answer should be 66 inches of precipitation. Hope this helps!
Rounded to the nearest inch, there are 66 inches or precipitation.
Look at the numbers after the decimal point. Do they round up or down? In normal circumstances, would it round to 0, or to 100? It wouldn't round to 100. Anything 50 and above would round to 100, and this is not 50, nor is it more than 50.
So this rounds to the previous number, which is 66.
This means that we are 80% confident that the mean of the drive-through service time is between 178.0 seconds and 181.0 seconds. This conclusion was obtained after examined 576 customers. If you want a greater % of confidence you will have to lower the lower bound and increase the upper bound
