Stats Hw
Statistics Homework – Week 2
Chapter 1:
1.1 -
Three different types of drinks are sold at a fast food restaurant – soft drinks, fruit juices and coffee.
A) Explain why the type of drinks sold is an example of a categorical variable
Categorical variables take values that fall into one or more categories. As there are 3 different types of drinks, they would all fall into their own categories rather than numerical.
B) Explain why the type of drinks sold is an example of a nominally scaled variable
The type of drinks sold is an example of a nominally scaled variable as there are no rankings involved between the drinks. For example, each type of drink is equal.
1.3 -
Suppose that you measure the time it takes to download an MP3 file from the internet. A) Explain why the download is a numerical variable
Numerical variables record numbers through observations. As the time taken to download the file produces a number represented by time, the download is a numerical variable.
B) Explain why the download time is a ratio scaled variable
The download time is a ratio scaled variable as the time differences involve a true zero point, meaning that they use the same time scale.
1.7 -
Suppose the following information is collected from Andrew and Fiona Chen on their application for a home mortgage loan at metro home loans: A) Monthly expenses; $1 820
Type: Numerical - Continuous
Level of measurement: Interval scale
B) Number of children being supported by applicant(s): 2
Type: Numerical - Discrete
Level of measurement: Interval scale
C) Annual family salary income; $95 000
Type: Numerical - Continuous
Level of measurement: Interval scale
D) Marital status: Married
Type: Categorical
Level of measurement: Ratio scale
Classify each of the responses by type of data and level of measurement.
Chapter 2:
2.5
A)
B)
Pat should have on display many white, blue and red cars, as they make up over half of the
Chapter 1:
1.1 -
Three different types of drinks are sold at a fast food restaurant – soft drinks, fruit juices and coffee.
A) Explain why the type of drinks sold is an example of a categorical variable
Categorical variables take values that fall into one or more categories. As there are 3 different types of drinks, they would all fall into their own categories rather than numerical.
B) Explain why the type of drinks sold is an example of a nominally scaled variable
The type of drinks sold is an example of a nominally scaled variable as there are no rankings involved between the drinks. For example, each type of drink is equal.
1.3 -
Suppose that you measure the time it takes to download an MP3 file from the internet. A) Explain why the download is a numerical variable
Numerical variables record numbers through observations. As the time taken to download the file produces a number represented by time, the download is a numerical variable.
B) Explain why the download time is a ratio scaled variable
The download time is a ratio scaled variable as the time differences involve a true zero point, meaning that they use the same time scale.
1.7 -
Suppose the following information is collected from Andrew and Fiona Chen on their application for a home mortgage loan at metro home loans: A) Monthly expenses; $1 820
Type: Numerical - Continuous
Level of measurement: Interval scale
B) Number of children being supported by applicant(s): 2
Type: Numerical - Discrete
Level of measurement: Interval scale
C) Annual family salary income; $95 000
Type: Numerical - Continuous
Level of measurement: Interval scale
D) Marital status: Married
Type: Categorical
Level of measurement: Ratio scale
Classify each of the responses by type of data and level of measurement.
Chapter 2:
2.5
A)
B)
Pat should have on display many white, blue and red cars, as they make up over half of the