Unit 1

Question 1

Quantitative

Answer 1

UNIT 1: Uses numerical values where arithmetic operations make sense

Question 2

Categorical

Answer 2

UNIT 1: Places individual into one of several groups/categories

Question 3

How do you access graphs on a calculator?

Answer 3

STAT PLOT

Question 4

Bar Graph

Answer 4

UNIT 1: Categorical data ONLY

Question 5

Dot Plot

Answer 5

UNIT 1: Categorical and quantitative, small data sets

Question 6

Survey

Answer 6

UNIT 1: Select representative sample of the population, asks questions without influencing

Question 7

Observational Study

Answer 7

UNIT 1: Observe/investigate a representative sample, find pre-existing circumstances

Question 8

Experiment

Answer 8

UNIT 1: Do SOMETHING to representative sample, don’t change anything else

Question 9

Histogram

Answer 9

UNIT 1: Quantitative data ONLY, bars usually touch.
- larger data sets
- break up range by using own judgement
- display count (“frequency”) in each class

Question 10

Stemplots

Answer 10

UNIT 1: Quantitative data ONLY
- separate into stems
- provide a key!

Question 11

SOCS

Answer 11

UNIT 1: Shape
- symmetric vs skewed, whichever way the hump is its skewed the OPPOSITE way
- uniform
- “approximately normal”

Outliers
- 1.5 * IQR

Center
- mean: add #’s, divide by amount of #’s
- median: use if its skewed
** use STAT, then 1-vers

Spread
- use IQR
- range if you dont have IQR

CONTEXT

Question 12

5-Number Summary

Answer 12

UNIT 1: - Minimum
- Q1 (25th percentile)
- Median
- Q3 (75th percentile)
- max

Q1-Q3 = “interquartile range”

Question 13

IQR

Answer 13

UNIT 1: IQR = Q3 - Q1

Question 14

1.5 * IQR

Answer 14

UNIT 1: Q1 - (1.5 * IQR) -> lower than this # = outlier
Q3 + (1.5 * IQR) -> higher than this # = outlier