Based on the Scenario below, what is the Control group? 7/1
An automobile manufacturer wants to know whether using extra bright brake lights will minimize the time
required for a driver to realize that the car in front of them is stopping and to hit the brakes. The manufacturer
tested 50 cars with very bright brake lights and 50 cars with normal brake lights and recorded the time required
for the driver of the following car to hit the brakes after the brake lights were lit.
(1. The time it took drivers to hit the breaks)
(2. The normal brake lights)
(3. The extra bright brake lights)

Determine if the following statement is true or false. the normal curve is symmetric about its​ mean, mu. choose the best answer below. a. the statement is false. the normal curve is not symmetric about its​ mean, because the mean is the balancing point of the graph of the distribution. the median is the point where​ 50% of the area under the distribution is to the left and​ 50% to the right.​ therefore, the normal curve could only be symmetric about its​ median, not about its mean. b. the statement is true. the normal curve is a symmetric distribution with one​ peak, which means the​ mean, median, and mode are all equal.​ therefore, the normal curve is symmetric about the​ mean, mu. c. the statement is false. the mean is the balancing point for the graph of a​ distribution, and​ therefore, it is impossible for any distribution to be symmetric about the mean. d. the statement is true. the mean is the balancing point for the graph of a​ distribution, and​ therefore, all distributions are symmetric about the mean.