The lengths of phone calls to the receptionist of a small company are i. i.d. with a mean of 5 minutes and an sd of 8 minutes. a) find or approximate the chance that the total length of the next 250 calls is less than 20 hours. b) did you use the normal curve in your calculation in a? if so, which of the following did the curve represent and why? pick one and explain. (i) the the distribution of the lengths of the next 250 calls (ii) the probability distribution of the total length of the next 250 calls (iii) the observed distribution of the total length of the next 250 calls

answer:

34567890

step-by-step explanation:

answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following

step-by-step explanation: