WorksheetsSampling/Data/Descriptive Statistics
Total questions: 25
Worksheet time: 2hrs 5mins
Identify the Population:
Frederick Community College randomly selected 50 professors to find out which technology resource it's professors feel is the most effective.
50 Professors
All Frederick Community College Professors
Students
Frederick Community College
A restaurant wants to know if their customers buy dessert when they eat out. As people leave the restaurant one evening, 20 people are surveyed at random. Eight people say they usually order dessert when they eat out. The restaurant concluded that most customers do not order dessert.
Assign each car in a dealership a number and then use a random-number generator to select the cars to be inspected.
systematic
simple random sample
sample of convenience
stratified
This is a form of:
An independent research company wants to go door to door to survey people in the city of Fontana. The company decides to number all blocks within the city limit, randomly choose 5 blocks and survey all households on those blocks.
This is an example of:
Simple Random Sample
Stratified Random Sample
Cluster Random Sample
Systematic Random Sampling
A teacher splits her classes up by period. She then randomly picks 3 students from each period to do a survey.
Stratified.
Systematic
Cluster
Biased.
Source of bias in which people CHOOSE to respond and usually only people with very strong opinions respond
Leading Question Bias
Social Acceptability Bias
Non Response Bias
Voluntary Response
Respondents to surveys exaggerate their physical activity levels and underestimate their level of sedentary behaviour. This is known as ...
Voluntary Response Bias
Non Response Bias
Leading Question Bias
Social Acceptability Bias
How long does the bus to Birchington take?
continuous
discrete
How many cows are there in that field?
continuous
discrete
The leaf is 5 mm wide.
qualitative
quantitative
Can pleasant aromas help a student learn better? Two researchers believed that the presence of a floral scent could improve a person's learning ability in certain situations. They had 22 people work through a pencil-and-paper maze 6 times. Three of the times they wore a floral-scented mask and three times they wore an unscented mask. The three trials for each mask followed one another. Testers measures the length of time it took subjects to complete each of the six trials. They reported that, on average, subjects wearing the floral-scented mask completed the maze more quickly that those wearing the unscented mask, although, the difference was not statistically significant. This study is:
a randomized experiement
an oberservational study
a double-blind experiment
Which of the following distinguishes an observational study from a randomized experiment?
In an observational study volunteers are always used, whereas in a randomized experiment a random sample is always taken from the population.
In an observational study a random sample is always taken from the population, whereas in a randomized experiment volunteers are always used.
In an observational study treatments are not randomly assigned, whereas in a randomized experiment treatments are randomly assigned.
In an observational study a control group is never used, whereas in a randomized experiment a control group is always used.
An observational study can be double-blind, whereas a randomized experiment can only be single-blind because the experimenter determines who is randomly assigned to each treatment.
Does using a cell phone while driving make an accident more likely? Researchers compared telephone company and police records to find 699 people who had cell phones and were also involved in an auto accident. Using phone billing records, they compared the frequency of accidents when cell phones were in use to the frequency when they were not in use. This study is
An observational study
A randomized experiment
These are any variables that could interfere with results.
confounding variables
interfering variables
controlled variables
experimental variables
