Probability and Statistics Quiz

What does the Law of Large Numbers state about trials?

• Trials are dependent on each other.

• Trials have no effect on each other.

• Trials are always fixed in number.

• Trials are always independent.

What is the probability range for any event?

• Between 0 and 2

• Between -1 and 1

• Between 0 and 1

• Between 1 and 2

What is the complement of an event A?

• The event that A does not happen

• The event that A happens twice

• The event that A happens with another event

• The event that A happens three times

What does the term "odds" measure?

• The likelihood of an event happening

• The likelihood of an event not happening

• The likelihood of an event happening or not happening

• The likelihood of an event happening twice

What is the formula for expected value?

• (sum of outcomes) / (number of outcomes)

• (probability of event) x (number of trials)

• (sum of all possible values) x (probability of each value)

• (sum of all possible values) / (number of trials)

Diagram showing probability and odds formulas

• Probability = Number of favorable outcomes / Total number of outcomes

• Odds = Number of favorable outcomes / Number of unfavorable outcomes

• Probability = Number of unfavorable outcomes / Total number of outcomes

• Odds = Total number of outcomes / Number of favorable outcomes

What does a confidence interval estimate?

• An unknown parameter

• A known parameter

• A sample mean

• A population mean

What is the probability called that indicates how often a method would produce an interval containing the parameter?

• Confidence level

• Significance level

• P-value

• Z-score

What is the null hypothesis in a test of significance?

• What we test against the claim

• What we think is true

• The sample mean

• The population mean

What does a small P-value indicate in hypothesis testing?

• Strong evidence against the null hypothesis

• Weak evidence against the null hypothesis

• No evidence against the null hypothesis

• Evidence supporting the null hypothesis