JPT_Probability & Statistics Exam Review

Front

What is the sample space for flipping two coins?

Back

The sample space is {HH, HT, TH, TT}.

Front

What is the probability of choosing a white marble followed by a red marble without replacement?

Back

The probability is 1/15.

Front

What percent of data on a normal curve is between z=0 and z=1.23?

Back

38.9%.

Front

How do you calculate the probability of selecting a red or brown marble from a jar?

Back

P(red or brown) = Number of red or brown marbles / Total number of marbles.

Front

What is the upper quartile (Q3) in a data set?

Back

The upper quartile (Q3) is the median of the upper half of the data.

Front

Define probability.

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Front

What is a normal distribution?

Back

A normal distribution is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence.

Front

What does the z-score represent in statistics?

Back

The z-score represents the number of standard deviations a data point is from the mean.

Front

How do you find the mean of a data set?

Back

The mean is found by adding all the values together and dividing by the number of values.

Front

What is the difference between independent and dependent events in probability?

Back

Independent events do not affect each other's outcomes, while dependent events do.