The mean height of an adult giraffe is 17 feet. suppose that the distribution is normally distributed with standard deviation 0.9 feet. let x be the height of a randomly selected adult giraffe. round all answers to 4 decimal places where possible.

a. what is the distribution of x? x ~ n([],[])

b. what is the median giraffe height? [] ft.

c. what is the z-score for a giraffe that is 18.5 foot tall? []

d. what is the probability that a randomly selected giraffe will be shorter than 18 feet tall? []

e. what is the probability that a randomly selected giraffe will be between 16.9 and 17.9 feet tall? []

f. the 75th percentile for the height of giraffes is [] ft.

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

An annual marathon covers a route that has a distance of approximately 26 miles. winning times for this marathon are all over 2 hours. the following data are the minutes over 2 hours for the winning male runners over two periods of 20 years each. earlier period 14 12 15 22 13 10 19 13 9 14 20 18 16 20 23 12 18 17 6 13 recent period 7 11 7 14 8 9 11 14 8 7 9 8 7 9 9 9 9 8 10 8 (a) make a stem-and-leaf display for the minutes over 2 hours of the winning times for the earlier period. use two lines per stem. (use the tens digit as the stem and the ones digit as the leaf. enter none in any unused answer blanks. for more details, view how to split a stem.) minutes beyond 2 hours earlier period 0 1 2 (b) make a stem-and-leaf display for the minutes over 2 hours of the winning times for the recent period. use two lines per stem. (use the tens digit as the stem and the ones digit as the leaf. enter none in any unused answer blanks.) minutes beyond 2 hours recent period (c) compare the two distributions. how many times under 15 minutes are in each distribution