Question

1A) Manufacturers use random samples to test whether or not their product is meeting specifications. These samples could be people, manufactured parts, or even samples during the manufacturing process of potato chips.

(a) Do you think that all random samples taken from the same population will lead to the same result?

-yes

-no, but they are fairly close    

(b) What characteristic (or property) of random samples could be observed during the sampling process?

-population size

-variability  

-population parameters

-none of the above

1B) Consider a normal population with μ = 42 and σ = 5.4. Calculate the z-score for an x of 44.2 from a sample of size 12. (Give your answer correct to two decimal places.)

Answer 1