Bivariate Data
Which of the following involves collecting bivariate data?
A) The relationship between class attendance and final grades among students
B) Average battery life of different smart phone models
C) The average snowfall in various regions
D) The number of books read by students over summer break
A) The relationship between class attendance and final grades among students
In a study investigating the effect of sunlight on plant growth, what are the independent and dependent variables?
A) Independent: Plant Growth, Dependent: Sunlight
B) Independent: Sunlight, Dependent: Plant Growth
C) Both variables are dependent
D) Both variables are independent
B) Independent: Sunlight, Dependent: Plant Growth
Hannah has chosen to collect information using a sample instead of a census.
What are the advantages to doing a sample? CHOOSE 2 ANSWERS!
A) It is cheaper to conduct
B) There will be no sampling bias
C) It's more accurate
D) It takes less time
A) It is cheaper to conduct
D) It takes less time
Consider the following variables and statement:
Ticket Sales & Revenue
Ticket sales affect the revenue made from a show.
Which is the independent variable and which is the dependent variable?
A) The IV is the number of ticket sales, DV is revenue from show
B) The IV is the revenue from the show, DV is number of ticket sales
A) The IV is the number of ticket sales, DV is revenue from show
Given a dataset on daily temperatures and clothing sales, which of the following questions would require bivariate data analysis?
A) What is the most common type of clothing sold?
B) What is the average daily temperature in the region?
C) How do daily temperatures affect clothing sales?
D) How many clothing items were sold on the hottest day of the year?
C) How do daily temperatures affect clothing sales?
Consider the two variables: typing speed and dancing ability.
Do you think there is a relationship between them?
Nope!
Drawing out the winning ticket number in a lottery is an example of:
A) Random Sampling
B) Stratified Sampling
C) Systematic Sampling
A) Random Sampling
The local mayor wants to determine how people in her town feel about the new construction project.
She selects 10% of the residents from each suburb to survey.
This is an example of:
A) Stratified Sampling
B) Systematic Sampling
C) Convenience Sampling
D) Simple Random Sampling
A) Stratified Sampling
"Does exercising in the morning increase energy levels?"
How can you make this question more statistical?
A) Ask about preferred exercise routines, don't say time of day
B) Include both exercising in the morning and at other times for comparison.
C) Change the question to focus only on energy levels.
D) Specify the type of exercise and time of day.
B) Include both exercising in the morning and at other times for comparison.
Consider the two variables: time spent studying and exam performance.
Is there likely to be a relationship between the two?
Yes!
Choosing every 5th person on the class roll to take part in a survey is an example of:
A) Stratified Sampling
B) Random Sampling
C) Systematic Sampling
C) Systematic Sampling
True or False:
In looking at the relationship between sea temperature and the amount of healthy coral, the independent variable is sea temperature and the dependent variable is level of healthy coral.
True
True or False: We should use a proportion in the following scenario
In a group of 360 students, 90 are primary and 270 are secondary students. A stratified sample of 120 is to be selected from the group based on year level.
True
Consider the two variables: temperature and ice cream sales.
Is there likely to be a relationship between them?
Yes!
We want to find out what the average reaction times for humans is.
Should we collect data on the population (census) or a sample?
Sample
The principal wants to use systematic sampling on their survey on how students feel about the new phone rules.
Which is an example of systematic sampling?
A) Organize every student in the year by their height and then select every 7th person in line
B) Interview every 7th person that walks past their office
C) Interview 110 random people from the year
A) Organize every student in the year by their height and then select every 7th person in line