Podcast
Questions and Answers
What is the parameter representing the mean or expectation of the normal distribution?
What is the parameter representing the mean or expectation of the normal distribution?
- $rac{1}{ u}$
- $rac{1}{ heta}$
- $rac{1}{ ext{μ}}$ (correct)
- $rac{1}{eta}$
Which theorem states that the average of many samples of a random variable with finite mean and variance converges to a normal distribution?
Which theorem states that the average of many samples of a random variable with finite mean and variance converges to a normal distribution?
- Law of large numbers
- Pythagorean theorem
- Bayes' theorem
- Central limit theorem (correct)
What is the variance of a normal distribution with standard deviation $ ext{σ}$?
What is the variance of a normal distribution with standard deviation $ ext{σ}$?
- $rac{1}{2 ext{σ}}$
- $ ext{σ}^2$ (correct)
- $rac{1}{ ext{σ}^2}$
- $2 ext{σ}$
What type of distribution is often used to represent real-valued random variables in natural and social sciences?
What type of distribution is often used to represent real-valued random variables in natural and social sciences?
What does the parameter $ ext{σ}$ represent in the normal distribution?
What does the parameter $ ext{σ}$ represent in the normal distribution?
What is the formula for calculating the standard score (z-score) of a raw score?
What is the formula for calculating the standard score (z-score) of a raw score?
What type of scores have positive standard scores according to the standard score definition?
What type of scores have positive standard scores according to the standard score definition?
What is another common term used interchangeably with 'standard score'?
What is another common term used interchangeably with 'standard score'?
When computing a z-score with only a sample of observations, what should be used instead of the population parameters?
When computing a z-score with only a sample of observations, what should be used instead of the population parameters?
What does a negative z-score indicate about a raw score in relation to the mean?
What does a negative z-score indicate about a raw score in relation to the mean?
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