Statistics Quiz (Easy 2)

What does a Z score indicate about a data point in a standard normal distribution?

What does skewness measure in a distribution?

Why is it desirable for observations in a statistical analysis to be independent and identically distributed (iid)?

Two events A and B are said to be independent if:

What does it mean for two events to be mutually exclusive?

How is conditional probability defined?

In statistics, what is the relationship between independence and correlation?

 Independence implies zero correlation, but zero correlation does not imply independence.

According to the Empirical Rule, approximately what percentage of data falls within one standard deviation of the mean in a normal distribution?

In hypothesis testing, what does the p-value represent?

Which statistical test is used to determine if there is a significant association between two categorical variables?

What is the primary purpose of a confidence interval in statistics?

What is the main concept behind the Law of Large Numbers in statistics?

What does the term “outlier” refer to in statistics?

What is the purpose of a histogram?