A researcher wants to study the opinions of nurses in a hospital. They randomly select 5 departments and then survey every nurse in those departments. What sampling method is being used?
Systematic Sampling
Stratified Sampling
Simple Random Sampling
Cluster Sampling
The temperature in Celsius is an example of what level of measurement?
Ordinal
Ratio
Interval
Nominal
A frequency distribution shows the:
Number of times each value of a variable occurs in a dataset
Spread or variability of data points around the mean
Probability of a particular outcome in an experiment
Average value of a variable in a dataset
What is the mode of the following dataset: 2, 5, 3, 2, 8, 2, 6?
2
6
5
8
Events A and B are independent. The probability of A is 0.4, and the probability of B is 0.5. What is the probability of both A and B happening?
0.7
0.9
0.2
0.1
The probability of an event happening is 0.3. What is the probability of the event NOT happening?
0.3
0.6
1
Which chart type is most suitable for visualizing the relationship between two continuous variables?
Pie Chart
Box Plot
Scatter Plot
Bar Chart
Which of the following is an example of a qualitative variable?
Height in centimeters
Favorite color
Number of siblings
Temperature in Celsius
If the range of a dataset is 20, and the smallest value is 5, what is the largest value?
20
Cannot be determined
25
15
Which of the following is NOT a characteristic of a normal distribution?
Mean, median, and mode are equal
The total area under the curve equals 1
Bell-shaped and symmetrical
Asymmetry with a longer tail on one side