Review for Exam (Prob & Stats)

Front

What does it mean if an experiment is double blind?

Back

Neither the subject nor the doctor knows who is getting the placebo.

Front

What is the standard normal distribution?

Back

A normal distribution with a mean of 0 and a standard deviation of 1.

Front

How do you find the probability of a range in a standard normal distribution?

Back

Use the z-table to find the area under the curve between the two z-scores.

Front

What is the formula for calculating the probability of getting exactly x successes in n trials?

Back

P(X = x) = (nCx) * (p^x) * (q^(n-x)), where p is the probability of success and q is the probability of failure.

Front

What is convenience sampling?

Back

A sampling method where participants are selected based on their easy availability.

Front

What is the total number of outcomes when flipping a coin n times?

Back

2^n, where n is the number of flips.

Front

What is the probability of getting exactly 1 correct answer on a 3-question multiple-choice test with 5 options?

Back

38.4%.

Front

What is a z-score?

Back

A measure of how many standard deviations an element is from the mean.

Front

What is the difference between a population and a sample?

Back

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

Front

What is stratified sampling?

Back

A sampling method that involves dividing the population into subgroups and taking a sample from each.