In example 5.1, the total sleep time per night among college students was approximately normally distributed with mean µ = 6.78 hours and standard deviation s = 1.24 hours. suppose you plan to take an srs of size n = 150 and compute the average total sleep time. what is the probability that your average will be below 6.9 hours? what is the probability that your average will be below 6.9 hours? ( fill in the blank below and round your answer to 4 decimal places.) ( fill in the blank below and round your answer to 4 decimal places.)

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies