The following random sample from a population whose values were normally distributed was collected. 10, 12, 18, 16. The 80% confidence interval for the mean is

12.054 to 15.946 10.108 to 17.892
10.321 to 17.679
11.009 to 16.991

f urself

Step-by-step explanation:

hahahhaa

19

step-by-step explanation:

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."