How is probability used in inferential statistics? A researcher uses probability to calculate the mean value of a sample. A researcher uses probability to decide whether to draw a sample from a population. A researcher uses probability to help her decide whether she believes a treatment has had an effect.

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.

your answer is  

a.

5

step-by-step explanation:

134.6 us dollars

step-by-step explanation:

1 us dollar = 1.33 canadian dollars

so, 150 us dollars = 150 × 1.33 = $199.5.

in canada, the money mitchell spent = 20 canadian dollars.

remaining canadian dollars with him = 199.5 - 20 = 179.5.

after mitchell returned to us, he exchanged the remaining canadian dollars to us dollars.

179.5 canadian dollars = 179.5 × 0.75 = 134.6 us dollars.