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Questions and Answers

What is the purpose of using Z-values and the standard normal distribution?

To compare two different populations
To calculate the range of a dataset
To calculate probabilities and percentiles by the traditional method (correct)
To estimate the mean and standard deviation of a normal distribution

What is the purpose of using Z-values and the standard normal distribution?

To plot a scatter plot
To calculate probabilities and percentiles (correct)
To calculate the range of a distribution
To find the mean and median of a distribution

How do you use the standard normal distribution table to find the probability of a standard normal random variable being less than a given value?

Locate the value on the top margin and read the probability from the left margin (correct)
Locate the value on the body of the table and read the probability from the left margin
Locate the value on the left margin and read the probability from the top margin
Locate the value on the body of the table and read the probability from the top margin

How can you use the standard normal distribution table to find a percentile?

By locating the probability in the table closest to the given percentile and reading to the left and up (B) Signup and view all the answers

How do you calculate the percentile of a standard normal distribution given a probability?

Locate the probability in the table closest to the given probability and read the corresponding value from the left and up (A) Signup and view all the answers

What is the process for finding the probability that a normal distribution is less than a given value?

Standardize the value, find the corresponding Z-value, and use the standard normal distribution table to find the probability (D) Signup and view all the answers

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