# 1.13 Sampling and data: homework (edited: teegarden)

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This module presents students with a number of problems related to statistical sampling and data. In particular, students are asked to demonstrate understanding of concepts such as frequency, relative frequency, and cumulative relative frequency, random samples, quantitative vs. qualitative data, continuous vs. discrete data, and other key terms related to sampling and data. Labs changed to incorporate mini-tabs.

For each item below:

• ## I

Identify the type of data (quantitative - discrete, quantitative - continuous, or qualitative) that would be used to describe a response.
• ## Ii

Give an example of the data.
• ## A

Number of tickets sold to a concert
• ## B

Amount of body fat
• ## C

Favorite baseball team
• ## D

Time in line to buy groceries
• ## E

Number of students enrolled at Evergreen Valley College
• ## F

Most–watched television show
• ## G

Brand of toothpaste
• ## H

Distance to the closest movie theatre
• ## I

Age of executives in Fortune 500 companies
• ## J

Number of competing computer spreadsheet software packages
• ## A

quantitative - discrete
• ## B

quantitative - continuous

qualitative
• ## D

quantitative - continuous
• ## E

quantitative - discrete

qualitative

qualitative
• ## H

quantitative - continuous
• ## I

quantitative - continuous
• ## J

quantitative - discrete

Fifty part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below:

# of Courses Frequency Relative Frequency Cumulative Relative Frequency
1 30 0.6
2 15
3
• ## A

Fill in the blanks in the table above.
• ## B

What percent of students take exactly two courses?
• ## C

What percent of students take one or two courses?

Sixty adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below:

Flossing frequency for adults with gum disease
# Flossing per Week Frequency Relative Frequency Cumulative Relative Freq.
0 27 0.45
1 18
3 0.93
6 3 0.05
7 1 0.02
• ## A

Fill in the blanks in the table above.
• ## B

What percent of adults flossed six times per week?
• ## C

What percent flossed at most three times per week?

5%
• ## C

93%

A fitness center is interested in the average amount of time a client exercises in the center each week. Define the following in terms of the study. Give examples where appropriate.

Population

Sample

Parameter

Statistic

Variable
• ## F

Data

Ski resorts are interested in the average age that children take their first ski and snowboard lessons. They need this information to optimally plan their ski classes. Define the following in terms of the study. Give examples where appropriate.

Population

Sample

Parameter

Statistic

Variable

Data
• ## A

Children who take ski and snowboard lessons
• ## B

A group of these children
• ## C

The population average
• ## D

The sample average
• ## E

$X$ = the age of one child who takes the first ski or snowboard lesson
• ## F

A value for $X$ , such as 3, 7, etc.

A cardiologist is interested in the average recovery period for her patients who have had heart attacks. Define the following in terms of the study. Give examples where appropriate.

Population

Sample

Parameter

Statistic

Variable
• ## F

Data

Insurance companies are interested in the average health costs each year for their clients, so that they can determine the costs of health insurance. Define the following in terms of the study. Give examples where appropriate.

Population

Sample

Parameter

Statistic

Variable

Data
• ## A

The clients of the insurance companies
• ## B

A group of the clients
• ## C

The average age of the clients
• ## D

The average age of the sample
• ## E

$X$ = the age of one client
• ## F

A value for $X$ , such as 34, 9, 82, etc.

short run AC curves?
what is short run AC curves?
Jasmin
what is short run curves?
Jasmin
what is short run curves?
Jasmin
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mudasir
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Modi
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Hamid
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Modi
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Hamid
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Modi
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Hamid
who was the father of economic ?why?
who was the known as father of economic?why?
Mahesh
Rationing and hoarding
how do the size of a country's population affect labour force
a mixed economic system
What are the types of price elasticity of demand
what are massures to promote geographical mobility of labor?
Ngong
Is to make sure that a labourer to know more about his salary to earn before going to the direction
shehu
Trade is a basic economic concept involving the buying and selling of goods and services, with compensation paid by a buyer to a seller, or the exchange of goods or services between parties. Trade can take place within an economy between producers and consumers.
Miss
what is fisical policy?
fisical policy or fiscal policy?
Miss
what are.the characteristics of economic goods
Hamis
what are the importance of labour market?
Rachael
how discrib the rural development and their four stages
ye economics se related ha
Sheikh
1..traditional stage..no science and technology is applied hence poor productionuu.2..the take off stage..some development strategies are initiated eg transport system is improved but the traditional cultural belief still remain .3..the prematurely stage..technological methods of production are appl
President
applied leading to higher GDP..4..stage of mass consumption..
President
What is Easiest Formula For National Income?
national income/ agrrigate net value
Sheikh
what do you mean by the supply of goods
supply of good refer to the total unit of production which is ready to sell at a given price
Tenzin
what is implicit cost
Yeah
MOHAMED
any cost that has already occurred but not necessarily shown or reported as a separate expense.
President
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