quiz 2

Question 1

In a normal distrubution graph, what does the area under the curve tell us?

Answer 1

the probability of finding a member of a population in a range of values

Question 2

what is z?

Answer 2

it is a standard score that tells us how many standard deviations we are away from the mean

Question 3

What is the central limit theorem

Answer 3

It states that the sampling distribution of the mean will be normally distributed if the sample size is large enough. As our sample size increases, the variables “X” (sample mean) and “s” (sample standard deviation) get closer to the actual population values

Question 4

when do we use normal distribution curves?

Answer 4

When we think our sample set is normal and we want to see the probability of a certain event occuring/not occurring