Z score of 1 25
Percentiles and Z scores - Texas Instruments
A score of 65 is a z-score of 1.25. 2. A z-score of 1.25 is at the 89.44 percentile level leaving a 10.56% chance of selecting 1 person at random whose score is 65 or greater. Using the multiplication rule for independent events would give:.10*.10*.10=.001 or a .1% chance. 4. The table below shows the result of survey by a car dealer about the ...
Z scores - Education Service Center Region 13
A score that is 20 points above the mean. z=2. A score that is 10 points below the mean. z=-1. A score that is 15 points above the mean z=1.5. A score that is 30 points below the mean. z=-3. The Welcher Adult Intelligence Test Scale is composed of a number of subtests. On one subtest, the raw scores have a mean of 35 and a standard deviation of 6.
[DOC File]Probability and One-sample Z tests
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Find the z-scores corresponding to each of the following values: A score of 60, where the mean score of the sample data values is 40. A score that is 30 points below the mean 40. A score of 80, where the mean score of the sample data values is 30. A score of 20, where the mean score of the sample data values is 50.
[DOC File]Z-Score Practice Worksheet
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Find the corresponding percentile and x-value for a sunflower that has a z-score of 1.6. 14. The shoe sizes of a men’s basketball team are normally distributed with a mean of 11.5 and a standard deviation of 1.25. Find the corresponding percentile and x-value for a player that has a z-score of –3.1. 15. A machine is programmed to fill 10-oz ...
[DOC File]Z-Score Practice Worksheet
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a) Hitting 25% of the time they are at bat would give the player a batting average of 0.25 or higher. Since we were asked for those whose batting average is at least 25% of their times at bat, we want the area to the right of this z-score. So, 1 – (area …
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