If you toss a coin three times, what is the probability of getting at least one head?
3/8
7/8
1/8
1/2
A researcher wants to survey a sample of students from a university. They randomly select 5 departments and then survey every student within those departments. What sampling method is being used?
Systematic Sampling
Simple Random Sampling
Cluster Sampling
Stratified Sampling
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
Line graph
Scatter plot
Histogram
Which of the following is NOT a characteristic of a normal distribution?
The total area under the curve equals 1
Asymmetry with a longer tail on one side
Bell-shaped and symmetrical
Mean, median, and mode are equal
Why is understanding the difference between descriptive and inferential statistics important?
It helps in choosing the appropriate statistical methods for analysis.
It is mainly relevant for complex statistical research, not everyday data analysis.
It is not important; both types of statistics are used interchangeably.
It is only important for professional statisticians, not for beginners.
Which data type is represented by the ranking of athletes in a competition (1st, 2nd, 3rd, etc.)?
Ratio
Nominal
Ordinal
Interval
If the range of a dataset is 20, and the smallest value is 5, what is the largest value?
Cannot be determined
15
20
25
What does a variance of zero indicate about a dataset?
The dataset has a large amount of variation.
All data points are the same.
The data is perfectly normally distributed.
The mean is zero.
Drawing a card from a deck and then drawing another card without replacing the first is an example of:
Independent events
Mutually exclusive events
Complementary events
Dependent events
A frequency distribution shows the:
Probability of a particular outcome in an experiment
Number of times each value of a variable occurs in a dataset
Spread or variability of data points around the mean
Average value of a variable in a dataset