statistics question standard deviation

Question

This question is from the book statistics 9th ed robert s. witte and john s. witte on page 81. Standard deviation

question 4.2B) Assume tha the distribution of IQ scores for all college students has a mean of 120, with a standard deviation of 15. These two bits of information imply which of the following?

All students score between 105 and 135 because everybody is within one standard deviation above or below the mean. True or False?

Answer 1

fawls

standard deviashun inkulde bout 60% av the "populashun"

stat-man sae so wen him du his standard assumes

This is also kalled "1 sigma"

spred yer net twice as wide="2 sigma" & it shood hav 93% av the "poulashun"

& 3 sigma is oft yuzed tu impli almost evreewon, i.e. almost garanteed

all sept for the odd-ball hu refuze tu join in (Like me)