Chapter 3

Question 1

Five Measures of Location

Answer 1

arithmetic mean

weighted mean

median

mode

geometric mean

Question 2

Purpose of a Measure of Location

Answer 2

is to pinpoint the center of a distribution of data

Question 3

Purpose of Dispersion

Answer 3

often called the variation of spread in the data

Question 4

Discuss the meaning of the variables in population mean….

Answer 4

…….

Question 5

Discuss the meaning of the variables in the sample mean

Answer 5

……….

Question 6

A parameter is a characteristic

Answer 6

…..of a population

Question 7

A statistic is a characteristic

Answer 7

of a sample

Question 8

Important Properties of Arithmetic Mean

Answer 8

Question 9

Disadvantage of Mean

Answer 9

Question 10

How to answer population question?

Answer 10

lowercase mu

Question 11

How to answer sample question?

Answer 11

X bar

Question 12

How to answer weighted question?

Answer 12

X sub w

Question 13

What does everything mean in the weighted equation?

Answer 13

…….

Question 14

Weighted Mean: What does “w” actually mean?

Answer 14

frequecny counts

Question 15

The Median:

What is it?

What is not afffected by?

What levels of measure is it used for?

Answer 15

Question 16

The Mode: What is it?

What is not affected by?

Answer 16

Question 17

Weighted Mean: How can a frequecny distribution be used in relation to weighted mean?

Answer 17

can be used to find weighted mean

Question 18

positively skewed distribution: Which is the highest and why?

Answer 18

1. Mean
2. Median
3. Mode

Question 19

Negatively Skewed Distribution: Which is the highest and why?

Answer 19

1) Mode
2) Median
3) Mean

Question 20

Geometric Mean: Will Always be less or equal to what?

Answer 20

Arithmetic Mean

Question 21

Geometric Mean: How to do increases and decreases(think what you add or subtract from the decimal)

Answer 21

add or subtract 1

Question 22

Small Masure of Dispersion vs. Large Measure of Dispersion

Answer 22

Question 23

Mean Deviation

Answer 23

-the avergae by which values in a population or sample vary from their mean

Question 24

Mean Deviation: What should be done first and describe what the variables mean in the equation?

Answer 24

• find the mean first
• …….check the book

Question 25

Median: What must you do before finding a median?(this step is crucial)

Answer 25

order them from least to greastest