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?

binomial distribution

median= 2

range = 7-0 = 7

how to find median?

no. of term=28

median=(28+1)/2=14.5th term

the 14th and 15th term are 2, therefore the median is (2+2)/2 = 2

i believe your answer is 99.7% of 7-year-old children are between 46.6 inches and 49.5 inches tall.

mnkjn

step-by-step explanation:

can you post the graph?