The 400-meter race times recorded in the boys track meet was normally distributed with a standard deviation of 3 seconds. if david finished the race in 51.2 seconds with a z-score of -2.6, what is the mean time?

gregory's graph is incorrect because it shows 2 inches of growth for each week when it should show 0.75 inches of growth each week.

answer by jkismyhusbandbae:

a) how close a measured value is to the actual (true) value.

  measure of length.   there are 12 inches in a foot, and 36 inches in a yard.   one inch is exactly 2.54 centimeters.

accuracy is how close something is to an actual answer but it is not exactly correct.