Test 1

Question 1

population

Answer 1

The entire collection of individuals or objects which information is desired

Question 2

Perimeter

Answer 2

a number that describes a population (true #/outcome)

Question 3

sample

Answer 3

a subset of the population, selected for study in some prescribed manner

Question 4

statistic

Answer 4

a number that describes a sample

Question 5

descriptive statistics

Answer 5

organizing/ summarizing data so it can be understood

Question 6

Inferential Statistics

Answer 6

making generalizations from a sample to population

Question 7

observation/case

Answer 7

an individual entity in a study

Question 8

variable

Answer 8

a characteristic that may differ among individuals

Question 9

frequency table

Answer 9

count how many observations fall into each category

Question 10

relative frequency table

Answer 10

calculate the proportion of observations in each category

Question 11

proportion

Answer 11

count/ total (normally a decimal)

Question 12

dot plot

Answer 12

displays individual data value along the x axis and uses dots to represent the frequencies

Question 13

percentage

Answer 13

count/total*100%

Question 14

histograms

Answer 14

displays data range along the x axis and uses rectangular bars to represent frequencies

Question 15

what is SOCS?

Answer 15

shape, outliers, center and spread

Question 16

“how does this distribution look like?”… what do you respond with?

Answer 16

You respond with SOCS

Question 17

what is a histogram for?

Answer 17

numerical data

Question 18

If the distribution is: symmetric w/ no outliers, what do you use?

Answer 18

mean(center) and standard deviation(spread)

Question 19

If the distribution is: skewed and/or has outlier, what do you use?

Answer 19

median(center) and IQR(spread)

Question 20

mean

Answer 20

the average of a set of observations

Question 21

median

Answer 21

value of middle observation when observations are listed in ascending/ decsending order

Question 22

what are the three measures of spread?

Answer 22

range, st. dev, IQR

Question 23

range

Answer 23

R= max /data value - min/data value

Question 24

standard deviation

Answer 24

of a variable is a measure characterizes how spread apart the values of a variable in a data set are

Question 25

IQR

Answer 25

are measures of position that divide the data into fourths. (equal parts)

Question 26

5 order summary

Answer 26

min, Q1, median/Q2, Q3, max

Question 27

Lower Fence

Answer 27

Q1-1.5(IQR)

Question 28

Upper fence

Answer 28

Q3+1.5(IQR)

Question 29

how do you interpret z score?

Answer 29

This individual’s variable is # standard deviations larger/smaller than the mean variable.

Question 30

How do you interpret standard deviation?

Answer 30

The typical variable name falls within # units of the mean variable.

Question 31

How do you interpret percentile?

Answer 31

**#% ** of individuals have a variable name less than #units.