If the range of a dataset is 20, and the smallest value is 5, what is the largest value?
25
15
20
Cannot be determined
Which of the following is an example of a discrete variable?
Temperature of a room
Weight of a package
Height of a student
Number of siblings someone has
The mean of a dataset is 15 and the standard deviation is 3. What percentage of data points lie within 12 and 18?
Approximately 95%
Approximately 68%
Cannot be determined from the given information
Approximately 99.7%
What is the alternative hypothesis in a statistical test?
The statement we are trying to disprove.
The statement that is always true.
The statement of no change or no relationship.
The statement we accept if the null hypothesis is rejected.
What is the primary use of a bar chart?
Displaying the relationship between two continuous variables
Representing parts of a whole
Showing the distribution of a continuous variable
Comparing values across different categories
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?
Students who sleep less than 6 hours a night
The 100 students surveyed
All college students in the world
All college students at the researcher's university
The 25th percentile is also known as the:
Third Quartile
First Quartile
Interquartile Range
Second Quartile
Which of the following is an example of a variable measured at the interval level?
Letter Grade (A, B, C, D, F)
Temperature in Fahrenheit
Gender
Height in centimeters
Which of the following is an example of a qualitative variable?
Number of siblings
Temperature in Celsius
Favorite color
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?
Stratified Sampling
Simple Random Sampling
Cluster Sampling
Systematic Sampling