Getting started with statistics

Question 1

_______ is the evidence of gathering, describing, and analyzing data

Answer 1

statistics

Question 2

________ are the actual numerical descriptions of sample data.

Answer 2

statistics

Question 3

What are the three subsets of the target population?

Answer 3

sampled population
sample frame
sample

Question 4

A _____ is a study in which data are obtained from every member of the population

Answer 4

census

Question 5

A ________ is a group from which the sample is taken

Answer 5

sampled population

Question 6

A ___________ is a physical list of all members of the sampled population.

Answer 6

sampling frame

Question 7

A ________ is a subset of the population from which data are collected. Must encompass the makeup of the target population.

Answer 7

sample

Question 8

Q: What is the difference between a population and a sample?

Answer 8

The population would represent the target population and the sample should be a representative subset of that population.

Question 9

What is a variable?

Answer 9

a value or characteristic that changes among members of the population.

ie 4, or blue

Question 10

Describe data?

Answer 10

are the counts, measurements, of observations, gathered about a specific variable in a population in order to study it.

Question 11

Describe a parameter?

Answer 11

is a numerical description of a population characteristic

Question 12

What is a sample statistic?

Answer 12

a numerical description of sample characteristics

Question 13

Q: What is the difference between a parameter and a statistic?

Answer 13

?

Question 14

Population vs Sample

Which is this?

Whole group
Group we want to know about
Characteristics are called parameters
Parameters are generally unknown
Parameters are fixed

Answer 14

This describes the population

Question 15

Population vs Sample

Which is this?

Part of the group
Group we do know about
Characteristics are called statistics
Statistics are always known
Statistics change with sample

Answer 15

This describes a sample

Question 16

Identify the population and the sample.

a. In a survey, 359 college students at the University of Jackson were asked if they had tried the October flavor of the month at the campus coffee shop. Eighty-three of the students surveyed answered yes.

Answer 16

The population is the University of Jackson students.

The sample that was surveyed = 359 students

Question 17

Identify the population and the sample.

b. A survey of 1125 households in the U.S. found that 24% subscribe to satellite radio.

Answer 17

The population is all of the American households

And the sample = 1125 which represents those that were contacted.

Question 18

Identify Population, Sample, Parameters, and Statistics

I. After an airplane security scare on Xmas day, 2009, the Gallup organization interviewed 542 American air travelers about increased security measures at airports. The report stated that 78% of American air travelers are in favor of U.S. airports using full-body imaging on airline passengers.

Answer 18

The population is all Americans
542 are the sample
78% is the Statistic measured off of the 542 Sample

Question 19

Identify Population, Sample, Parameters, and Statistics

Rasmussen Reports also conducted a survey in response to the airport security scare on Xmas, 2009. The national telephone survey of 1000 adult Americans found that 59% of Americans surveyed favor racial profiling as a means of determining which passengers to search at airport security checkpoints.

Answer 19

All Americans are the (target) population
a Sample of 1000 that were contacted
and a sample Statistic of 59%

Question 20

What are the two branches of Statistics?

Answer 20

descriptive
inferential

Question 21

What is meant by descriptive statistics?

Answer 21

as a science, gathers, sorts, summarizes and displays the data

Question 22

What is inferential statistics?

Answer 22

as a science, involves using descriptive statistics to estimate population parameters.

Question 24

List the two types of analysis?

Answer 24

exploratory
confirmatory

Question 25

What is exploratory analysis?

Answer 25

uses data to estimate parameters

Question 26

What is confirmatory analysis?

Answer 26

uses statistics to test claims about reality (hypotheses)(

Question 27

Identify Descriptive and Inferential Statistics

“AOL had 900 journalists, 500 hundred of them at its local Patch news organization… By the end of 2011, Bloomberg expects to have 150 journalists and analysts for it’s new Washington operation, Bloomberg Government

Answer 27

Indicating that there are 900 journalists and 500 located locally is descriptive.

the prediction or future that they’ll have an increase to 150 journalists and analysts is inferential.