Which of the following is an example of inferential statistics?
Estimating the average income of all citizens in a country based on a sample
Calculating the average height of students in a class
Creating a bar chart to show the distribution of grades on an exam
Finding the range of ages among employees in a company
The temperature in Celsius is an example of what level of measurement?
Nominal
Interval
Ratio
Ordinal
If you toss a coin three times, what is the probability of getting at least one head?
7/8
3/8
1/2
1/8
Which measure of central tendency is most affected by extreme values (outliers)?
All are equally affected
Median
Mode
Mean
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
In a probability distribution, what does a higher peak indicate?
Greater variability in the data
Smaller sample size
Higher probability of values around the peak
Lower probability of values around the peak
Which of the following correctly describes the null and alternative hypotheses?
The null hypothesis assumes a relationship, while the alternative hypothesis denies it.
The null hypothesis represents the status quo or no effect, while the alternative hypothesis proposes a specific effect.
The null hypothesis is what we aim to prove, and the alternative hypothesis is the opposite.
The null and alternative hypotheses are interchangeable.
What is the alternative hypothesis in a statistical test?
The statement that is always true.
The statement we are trying to disprove.
The statement of no change or no relationship.
The statement we accept if the null hypothesis is rejected.
Which of the following data types is most suitable for storing the number of children in a family?
Discrete
Continuous
Every 10th person entering a store is surveyed about their shopping experience. What type of sampling method is being used?
Stratified Sampling
Simple Random Sampling
Cluster Sampling
Systematic Sampling