Final Exam Review

Front

What is the probability of selecting a fan of neither the Reds nor the Guardians from a survey of 113 fans, where 49 are Reds fans, 63 are Guardians fans, and 38 are fans of both?

Back

0.3451

Front

In a contingency table, how do you calculate the probability that a yes voter is chosen given that a republican is chosen?

Back

P(Yes | Republican) = Number of Yes Republicans / Total Republicans = 12/56.

Front

What does it mean if there is a positive correlation between average monthly temperature and monthly air conditioning charges?

Back

As the average monthly temperature increases, the monthly charge for air conditioning also increases.

Front

What does it indicate if a histogram is skewed left?

Back

It indicates that the mean is less than the median, and in this case, the mean hours spent playing video games is less than 15.54 hours.

Front

What is the difference between a population and a sample in statistics?

Back

A population includes all members of a specified group, while a sample is a subset of the population.

Front

Define 'parameter' in the context of statistics.

Back

A parameter is a numerical value that summarizes a characteristic of a population.

Front

What is a 'statistic' in statistics?

Back

A statistic is a numerical value that summarizes a characteristic of a sample.

Front

How do you find the probability of an event?

Back

Probability = Number of favorable outcomes / Total number of possible outcomes.

Front

What is the formula for calculating the probability of the union of two events A and B?

Back

P(A or B) = P(A) + P(B) - P(A and B).

Front

What does it mean if two variables have no correlation?

Back

It means that there is no predictable relationship between the two variables.