Chapter 4 - Statistics

Question 1

The collection, tabulation, analysis, interpretation, and presentation of numerical data

Answer 1

Statistics

Question 2

The Five Aspects of Statistics

Answer 2

Collection, tabulation, analysis, interpretation, and presentation

Question 3

A collection of all possible elements, values, or items associated with a situation

Answer 3

Population

Question 4

A subset of elements or measurements taken from a population

Answer 4

Sample

Question 5

A sample will represent the population of it is

Answer 5

Random and Unbiased

Question 6

Each item in the population had the same opportunity to be selected

Answer 6

Random Sample

Question 7

Two types of statistics

Answer 7

Deductive (descriptive) and Inductive

Question 8

Describes a population or complete group of data

Answer 8

Deductive (descriptive) Statistics

Question 9

Deals with a limited amount of data or a representative sample of the population

Answer 9

Inductive Statistics

Question 10

Two types of numerical data

Answer 10

Continuous and Discrete

Question 11

Those quality characteristics that can be measured

Answer 11

Variables Data

Question 12

Those quality characteristics that are observed to be either present or absent, conforming or non-conforming

Answer 12

Attribute Data

Question 13

The measured value can take on any value within a range

Answer 13

Continuous Data

Question 14

Will be countable using whole numbers

Answer 14

Discrete Data

Question 15

Easily recognized because when viewed, it appears that the data are without order

Answer 15

Ungrouped Data

Question 16

Grouped together on the basis of when the values were taken or observed

Answer 16

Grouped Data

Question 17

Considered to be the difference between a value measured and the true value

Answer 17

Measurement Error

Question 18

Shows the number of times each of the measured values occurred when the data were collected.

Answer 18

Frequency Diagram

Question 19

Difference between histogram and frequency diagram

Answer 19

Data is grouped into cells on a histogram

Question 20

Refers to the form that the values of the measurable characteristics take on when plotted or graphed.

Answer 20

Shape

Question 21

Lack of symmetry

Answer 21

Skewness

Question 22

Peakedness of the data

Answer 22

Kurtosis

Question 23

Number of peaks in the data

Answer 23

Modes

Question 24

Two halves are mirror images of each other

Answer 24

Symmetrical

Question 25

A distribution with a high peak

Answer 25

Leptokurtic

Question 26

A flatter curve

Answer 26

Platykurtic

Question 27

If the distribution displays more than one peak

Answer 27

Multimodal

Question 28

Distributions with two distinct peaks

Answer 28

Bimodal

Question 29

Measures of central tendency

Answer 29

Averages, medians, modes

Question 30

Measures of dispersion

Answer 30

Range and standard deviation

Question 31

Shows the dispersion of the data within the distribution

Answer 31

Standard Deviation

Question 32

The standard deviation of the population is sometimes known as

Answer 32

Root mean square deviation

Question 33

A group of sample averages tends to be normally distributed; as sample size n increases, this tendency toward normality improves

Answer 33

Central limit theorem

Question 34

The area under the curve can be determined if blank and blank are known

Answer 34

Mean and standard deviation

Question 35

A technique that enables us to determine how well the subgroup average approximates the population mean

Answer 35

Confidence interval testing

Question 36

Equal to one-half the precision

Answer 36

Greatest Possible Error (GPE)

Question 37

When calculating, the final answer can be no more accurate than the blank

Answer 37

Incoming Data

Question 38

In general, for a frequency distribution, the number of cells or groups should be between blank and blank

Answer 38

5 and 20

Question 39

Whenever possible, the midpoint values should be blank blank so that they will be the same number of decimal places as the data values.

Answer 39

Odd Interval

Question 40

A simple technique to determine the cell interval is called…

Answer 40

The Sturgis Rule

Question 41

Blank blank are an extra decimal place or significant figure in accuracy than the observed values.

Answer 41

Boundary Values