Question 3

there was a thunderstorm in your area and the power is out. the traffic lights are not functioning. explain what you should do when you arrive at an intersection.

question 4

on a four lane highway, a red suv is directly in front of a red car in the far left lane, as the suv travels at the same pace as the vehicles in the lanes to the right of the suv. look at the far left lane in the picture. explain what the red car is doing and what it needs to do to travel safely.

The difference of sample means of two populations is 55.4, and the standard deviation of the difference of sample means is 28.1. which statement is true if we are testing the null hypothesis at the 95% confidence level? a. the difference of the two means is significant, so the null hypothesis must be rejected. b. the difference of the two means is significant, so the null hypothesis must be accepted. c. the difference of the two means is not significant, so the null hypothesis must be rejected. d. the difference of the two means is not significant, so the null hypothesis must be accepted.