10-) Given the following values, describe the shapes of the curve.

Mean 26.88

Median 27.75

Mode 27.5, 28

11-)Calculate the z score given the following information:

X= 15

Mean= 9

SD= 3

12-) If a researcher collects data from a sample, then that data will most likely form a normal curve.

a-) True

b-) False

13-) A team of researches collects data from 50 different sample over the course of 5 years. If they compare the means of all of the samples, they would be using what?

a-) Confidence Intervals.

b-) Standard Error.

c-) Mean of Means.

d-) Sampling Distribution of Means.

14-) Select the answer below that would represent a SAMPLE

a-) A poll of 100,000 people in the United States.

b-) A focus group of students at Albizu.

c-) A survey of every 100 costumers at Target.

d-) All of the above.

15-) Standard error is used when you are measuring a sample.

a-) True.

b-) False.

16-) Given an example of when you would use stratified sampling.

17-) In your own words, describe why we use samples in research.