Which of the following is closest to the standard deviation of the data set {11,15, 12, 18, 10, 22, 15,20) ? (1) 2.7
(3) 1.6
(2) 3.4
(4) 4.1

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

Kyle and elijah are planning a road trip to california. their car travels 3/4 of a mile per min if they did not stop driving, how many miles could kyle and elijah drive in a whole day? ? 1 day = 24 hours. plzzz i will give you 100 points

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?