Does talking on a cell phone make people react slower when driving? Sixty volunteers agree to have their reaction times tested in a driving simulator. Thirty of the drivers were randomly assigned to talk on the phone during the simulation, while the other drivers do not talk on the phone. During the simulation, a surprise event occurred which required the subject must to step on the brake. The time it took them to react is recorded. The mean response time of those talking on the phone was 4.3 seconds. The mean response time of those not talking on a cell phone was 2.9 seconds.

step-by-step explanation:

two pairs of adjacent sides are of equal length. this implies that one diagonal divides the kite into congruent triangles, and so the angles between the two pairs of equal sides are equal in measure. it also implies that the diagonals are perpendicular.

answer: 1475

step-by-step explanation:

becuase you have to know what they are asking you

y=sec x is the correct answer

~batmans wife dun dun

irst, find the z score of a score of 80. this is given by the formula z = (x-u)/o, where x is the score, u is the mean, and o is the standard deviation. this gives

z = (80-78)/12 = 1/6 = .1667

now, find what percentile a z score of 1/6 correlates to in the normal distribution.

a z score of 1/6 = .1667 is equivalent to the 56.36th percentile of the distribution. so the probability a score is over this is 1-.5636 = .4364

the mean of a sample mean is equal to the original mean. however, the standard deviation of a sample mean is equal to the original standard deviation divided by the square root of n (sample size). so the new standard deviation is 12/sqrt(16) = 3.

the new z score is 80-78/3 = 2/3 = .667. this is equivalent to the 74.86th percentile. so the probability that the mean will be greater than this score is 1-.7486 = .2514.