Statisitical Studies

Question 1

Sample Survey

Answer 1

Asks every member of the sample the same set of questions and records the answers (word problems with, “asks”)

Question 2

Experiment

Answer 2

Involves applying treatment to some group or groups and measuring the affects of the treatments, (word problems that use, “tries out”)

Question 3

Observational Study

Answer 3

Measure or observe members of a sample in such a way that they are not affected by the study (uses words like, “counts”)

Question 4

Stratified Sampling

Answer 4

When a population is divided into groups with similar characteristics and a sample is randomly chosen from each group.

Question 5

Cluster Sampling

Answer 5

When a population divided into convenient clusters, and random people from that cluster are chosen at random as a sample

Question 6

Systematic Sampling

Answer 6

When you start with one member chosen at random then use a rule like, “every 3rd member will be chosen.” To select members for the sample.

Question 7

Convenience Sampling

Answer 7

Only choosing people that are easy to get to our close to you

Question 8

Self-selected sampling

Answer 8

Volunteers opt to help for your sample

Question 9

Care MUST be taken to avoid bias

Answer 9

Stratified Sampling, Cluster Sampling, Systematic Sampling

Question 10

High Risk of Bias

Answer 10

Convenience Sampling, Self-selected sampling

Question 11

If the mean is higher than the median, then the curve is…

Answer 11

Skewed Right

Question 12

If the MEAN is lower than the MEDIAN then it is…

Answer 12

Skewed Left

Question 13

If the bell curve is normal, the measure of center is the…

Answer 13

Mean

Question 14

If the bell curve is skewed, the measure of center is the…

Answer 14

Median

Question 15

If it is a normal bell curve, the measure of spread is…

Answer 15

Standard Deviation

Question 16

If it is a skewed bell curve, the measure of spread is the…

Answer 16

IQR