Chapter 1

Question 1

Population

Answer 1

• The collection of all elements
• Represented by “N”

Question 2

Sample

Answer 2

-Subset of a population
-Noted by “n”

Question 3

Parameter

Answer 3

• A characteristic of a population (mean standard deviation etc.)

Question 4

Statistics

Answer 4

• A measurement derived from sample data

Question 5

Inferential Statistics

Answer 5

• Using sample statistics to draw inferences about parameters

Question 6

Descriptive Statistics

Question 7

Qualitative Data

Answer 7

• Categorical responses

Question 8

Quantitative Data

Answer 8

• Results in numbers

Question 9

Discrete data

Answer 9

• Quantitative
• Results in whole numbers

Question 10

Continuous data

Answer 10

• Quantitative
• Results in integers

Question 11

Central location

Answer 11

• Mean, Median, Mode

Question 12

Measures of Varitibility

Answer 12

• Range, Variance, Standard Deviation,

Question 13

Sample Variance

Answer 13

• S^2= sum of(x-xbar)^2/(n-1)

Question 14

Population Variance

Answer 14

• S^2= sum of(x-xbar)^2/(N)

Question 15

Sample Standard Deviation

Answer 15

• S= sqrt(sum of(x-xbar)^2/(n-1))

Question 16

Population Standard Deviation

Answer 16

• S= sqrt(sum of(x-xbar)^2/(N))

Question 17

Relative Position of Data

Answer 17

• Percentile Rank, Percentile, Quartile

Question 18

How to calculate percentile

Answer 18

I= (Percentile Rank/100)*samplesize

Question 19

How to calculate percentile rank

Answer 19

(Number of values below or equal to the number)/(Total number of values in the set) * 100%

Question 20

Five number summary

Answer 20

[xmin, Q1, Q2(median), Q3, xmax]

Question 21

Z-scores

Answer 21

• Way to locate if data is above or below average

Question 22

Sample z-score

Answer 22

Z=(x-xbar)/(sample standard deviation)

Question 23

Population z-score

Answer 23

Z=(x-xbar)/(population standard deviation)

Question 24

Find values from z scores

Answer 24

-Sample: Value= xbar + z-scoresample standard deviation
-Population: Vaule= xbar +z-scorepopulation standard deviation