chapter 11

Question 1

what is the difference b/w 2 pop means

Answer 1

m1 - m2 - pop

x bar 1 - xbar 2

Question 2

when dealing with the difference b/w 2 pop means, if you have random samples what is the adequate sample size

Answer 2

n1 greater than or = 30 and n2 is greater than or = to 30

Question 3

in cases where either or both samples sizes are less than 30, what is important

Answer 3

the distributions of the populations become important in whether they can be satisfied to assume the 2 pops are at least approximately normal

Question 4

inferences about the differences b/.w 2 pop means, When Q1 and Q2 are not known you will use what to estimate the unknown pop SD

Answer 4

S1 and S2

and we will use a t-distribution

Question 5

what is the formula for the degrees of freedom when making inferences about the difference b/w 2 pop means when Q1 and Q2 are not known

Answer 5

crazy one