A simple random sample from a population with a normal distribution of 105 body temperatures has x overbar equals 98.50degrees Upper Fand sequals 0.69 degrees Upper F Construct a 98% confidence interval estimate of the standard deviation of body temperature of all healthy humans. Is it safe to conclude that the population standard deviation is less than 1.10 degrees Upper F?

i have not got your picture clearly so see it once again

y=20x

: )

hope this

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."