25 Questions mixed types from a STAT class.
A sample of 20 observations has a standard deviation of 4. The sum of the squared deviations from the sample mean is:
What type of probability uses sample spaces to determine the numerical probability that an event will occur?
If A and B are any two events with P(A) = .8 and P(B|A) = .4, then the joint probability of A and B is
Find the variance of the following probability distribution.
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Which term is NOT synonymous with the expected value of a discrete probability distribution?
If a student randomly guesses at 20 multiple-choice questions, find the probability that the student gets exactly four correct. Each question has four possible choices.
The continuous distribution characterized by a symmetric, bell-shaped curve is the:
The standard deviation of a probability distribution must be:
The mean of a probability distribution can be:
The standard deviation of is usually called the
The theorem that states that the sampling distribution of the sample mean is approximately normal when the sample size n is reasonably large is known as the:
The standard normal distribution has a mean of ___ and standard deviation of ___, respectively.
rest on attach
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