A researcher wants to study the sleeping habits of college students. They survey 100 students from their university. What is the population in this scenario?
The 100 students surveyed
All college students in the world
All college students at the researcher's university
Students who sleep less than 6 hours a night
If the range of a dataset is 20, and the smallest value is 5, what is the largest value?
Cannot be determined
20
25
15
Which of the following is NOT a measure of dispersion?
Median
Range
Variance
Standard Deviation
The 25th percentile is also known as the:
First Quartile
Second Quartile
Interquartile Range
Third Quartile
What is the primary goal of hypothesis testing in statistics?
To prove the null hypothesis is true.
To prove the alternative hypothesis is true.
To determine the likelihood of observing the data if the null hypothesis were true.
To calculate the exact value of the population parameter.
What does the alternative hypothesis typically represent?
The statement of no effect or no difference.
The statement that is always rejected in hypothesis testing.
The statement that is always accepted in hypothesis testing.
The opposite of the null hypothesis.
Which of the following is an example of a discrete variable?
Weight of a package
Number of siblings someone has
Height of a student
Temperature of a room
Which of the following chart types is MOST effective for displaying data that changes over time?
Pie Chart
Line Graph
Scatter Plot
Box Plot
A researcher surveys 100 people and asks them how many pets they own. What type of graph would be most appropriate for displaying the frequency of each response (number of pets)?
Pie chart
Histogram
Scatter plot
Line graph
A researcher wants to ensure representation from different age groups (20-30, 31-40, 41-50, etc.) in their sample. Which sampling method is most appropriate?
Simple Random Sampling
Stratified Sampling
Systematic Sampling
Cluster Sampling