Exam 5: Standard Scores Z Scores

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Henry's first history exam score is +1 standard deviation from the mean in a normal distribution. The test has a mean of 65 and a standard deviation of 5. Henry's percentile rank would be approximately:

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A

In a psychology class of 100 students, test scores are normally distributed with a mean of 80 and a standard deviation of 5. Approximately what percentage of students have scores between 65 and 95?

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D

Sue's first psychology exam score is -2 standard deviations from the mean in a normal distribution. The test has a mean of 75 and a standard deviation of 5. Sue's percentile rank would be approximately:

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B

Faculty in the Psychology Department at State University consume an average of 5 cups of coffee per day with a standard deviation of 1.5. The distribution is normal. What is the percentile rank for an individual who consumes 8 cups of coffee per day?

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An individual at the 50th percentile would have a z score of _____.

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Students in a psychology department consume an average of 5 cups of coffee per day with a standard deviation of 1.75 cups. The number of cups of coffee consumed is normally distributed. -• What proportion of students consume an amount equal to or less than 6 cups per day?

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In a psychology class of 100 students, test scores are normally distributed with a mean of 80 and a standard deviation of 5. Approximately what percentage of students have scores between 75 and 85?

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Lee's first history exam score is +2 standard deviations from the mean in a normal distribution. The test has a mean of 65 and a standard deviation of 5. Lee's percentile rank would be approximately:

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An individual at the 25th percentile would have a z score of approximately _____.

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Students in a psychology department consume an average of 5 cups of coffee per day with a standard deviation of 1.75 cups. The number of cups of coffee consumed is normally distributed. -• How many cups would an individual at the 80th percentile drink?

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If the average height for women is normally distributed with a mean of 65 inches and a standard deviation of 2.5 inches, then approximately 68% of all women should be between _____ and _____ inches in height.

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An individual at the 75th percentile would have a z score of approximately _____.

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