1342 - Final Review Questions - Test #3

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What is the standard normal probability distribution?

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The standard normal probability distribution is a normal distribution with a mean of 0 and a standard deviation of 1. It is used to find probabilities and z-scores.

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How do you find the probability of a z-score in a standard normal distribution?

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To find the probability of a z-score, you can use the standard normal distribution table (z-table) or a calculator that provides cumulative probabilities for the standard normal distribution.

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What does the symbol @@ u@@ represent in statistics?

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The symbol @@ u@@ represents the population mean in statistics.

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What is the formula for finding the z-score?

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What is the significance of the area under the curve in a normal distribution?

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The area under the curve in a normal distribution represents the total probability, which equals 1. The area to the left of a z-score represents the probability of obtaining a value less than that z-score.

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What is the meaning of the term 'target parameter' in statistics?

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How do you interpret a probability of 0.421 in the context of a normal distribution?

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A probability of 0.421 indicates that there is a 42.1% chance that a randomly selected score will be greater than the specified value in the context of the normal distribution.

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How do you find the z-score corresponding to a given probability?

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To find the z-score corresponding to a given probability, use the inverse of the cumulative distribution function (CDF) for the standard normal distribution.