Reflection and Discussion
Casey was given the problem 57 + 274. He knows that addition is commutative, so the answer
to 57 + 274 is the same as 274 +57.
He wondered whether it was easier to solve 57 + 274 OR 274 +57.
What do you think?

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

Two lines that do not intersect are skew. always sometimes or never

Can someone answer this question? : )