Cudies show that massage therapy has a variety of health benefits and it is not too expensive. A sample
or 11 typical one - nour massage therapy sessions showed an rerage charge or 551. Ine population
standard deviation for a one - nour session is a = 54.5.
What assumptions about the population should we be willina to make it a margin of error is desired?
a. we should be willing to make the assumption that the population is at least approximately skewed lett
b. We should be willing to make the assumption that the population is at least approximately bimodal.
c. We should be willing to make the assumption that the population is at least approximately skewed right.
d. we should be willing to make the assumption that the population is at least approximately uniform.
e. We should be willing to make the assumption that the population is at least approximately normal.