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Earn +20 ptsQ: Is it true that z values have no units of measurements?
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Is it true or false that The area under a normal distribution curve is always positive even if the z value is negative?
It is true. Because the normal distribution is above the horizontal axis for all values, the area under it is a positive quantity no matter the z value.
What is z-chart in statistics?
A z-chart in statistics is a chart that contains the values that represent the areas under the standard normal curve for the values between 0 and the relative Z-score.
Do z-scores have a units of measure?
No, they do not. They are pure numbers.
What is true if someone has a z score of zero?
Z score of 0 is the mean of the distribution.
True or False the probability that a standard normal random variable Z is between 1.50 and 2.10 is the same as the probability Z is between -2.10 and -1.50.?
It is true because the distribution is symmetrical about Z=0.
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