What is the highest level of measurement for the variable 'weight of apples'?
Ratio
Interval
Ordinal
Nominal
The mean of a dataset is 15 and the standard deviation is 3. What percentage of data points lie within 12 and 18?
Approximately 95%
Approximately 99.7%
Approximately 68%
Cannot be determined from the given information
The temperature in Celsius is an example of what level of measurement?
Drawing a card from a deck and then drawing another card without replacing the first is an example of:
Mutually exclusive events
Dependent events
Complementary events
Independent events
What is the alternative hypothesis in a statistical test?
The statement of no change or no relationship.
The statement we accept if the null hypothesis is rejected.
The statement that is always true.
The statement we are trying to disprove.
A researcher wants to ensure representation from different age groups (20-30, 31-40, 41-50, etc.) in their sample. Which sampling method is most appropriate?
Cluster Sampling
Stratified Sampling
Simple Random Sampling
Systematic Sampling
A box plot can help identify which of the following in a dataset?
Outliers
Correlation
Causation
Mean
Which of the following is NOT affected by outliers?
Range
Median
Standard Deviation
In a probability distribution, what does a higher peak indicate?
Smaller sample size
Lower probability of values around the peak
Higher probability of values around the peak
Greater variability in the data
Descriptive statistics primarily deals with:
Drawing conclusions about populations from samples
Predicting future outcomes based on data trends
Testing hypotheses about population parameters
Summarizing and visualizing existing data