Which of the following is an example of a qualitative variable?
Temperature in Celsius
Number of siblings
Favorite color
Height in centimeters
What does a p-value represent in hypothesis testing?
The probability of observing the data if the null hypothesis were true.
The probability of the alternative hypothesis being true.
The probability of the null hypothesis being true.
The probability of making a Type I error.
In a deck of 52 cards, what is the probability of drawing a heart, given that you know the card is red?
1/2
1/4
1/52
1/13
What does a variance of zero indicate about a dataset?
The dataset has a large amount of variation.
The data is perfectly normally distributed.
The mean is zero.
All data points are the same.
A researcher wants to study the spending habits of shoppers at a mall. They randomly select every 10th shopper entering the mall to participate in a survey. What type of sampling method is this?
Cluster Sampling
Simple Random Sampling
Systematic Sampling
Stratified Sampling
What is the primary use of a bar chart?
Showing the distribution of a continuous variable
Representing parts of a whole
Displaying the relationship between two continuous variables
Comparing values across different categories
The temperature in Celsius is an example of what level of measurement?
Ratio
Interval
Nominal
Ordinal
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)?
Scatter plot
Pie chart
Histogram
Line graph
Which data type is represented by the ranking of athletes in a competition (1st, 2nd, 3rd, etc.)?
What is the mode of the following dataset: 2, 5, 3, 2, 8, 2, 6?
2
8
5
6