If the p-value is less than the significance level, what decision do we make regarding the null hypothesis?
Accept the null hypothesis.
Fail to reject the null hypothesis.
Conclude that the null hypothesis is true.
Reject the null hypothesis.
Which of the following is an example of a discrete variable?
Number of siblings someone has
Temperature of a room
Weight of a package
Height of a student
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 chart type is most suitable for visualizing the relationship between two continuous variables?
Scatter Plot
Pie Chart
Bar Chart
Box Plot
What does a pie chart primarily illustrate?
Correlation between variables
Distribution of a single variable
Trend over time
Parts of a whole
Which of the following correctly describes the null and alternative hypotheses?
The null hypothesis is what we aim to prove, and the alternative hypothesis is the opposite.
The null hypothesis represents the status quo or no effect, while the alternative hypothesis proposes a specific effect.
The null hypothesis assumes a relationship, while the alternative hypothesis denies it.
The null and alternative hypotheses are interchangeable.
Which of the following is NOT a type of discrete probability distribution?
Bernoulli distribution
Poisson distribution
Normal distribution
Binomial distribution
In a deck of 52 cards, what is the probability of drawing a heart, given that you know the card is red?
1/52
1/13
1/2
1/4
In a probability distribution, what does a higher peak indicate?
Higher probability of values around the peak
Greater variability in the data
Lower probability of values around the peak
Smaller sample size
Every 10th person entering a store is surveyed about their shopping experience. What type of sampling method is being used?
Systematic Sampling
Simple Random Sampling
Cluster Sampling
Stratified Sampling