Standardisation and the 68–95–99.7% Rule (VCE SSCE Mathematical Methods): Quizzes
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10 questions from this quiz
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Practise the questions
10 questions from this quiz
What % of values lie within 1 standard deviation of the mean in a normal distribution?
What % of values lie within 1 standard deviation of the mean in a normal distribution?
68%
What % of values lie within 2 standard deviations of the mean in a normal distribution?
What % of values lie within 2 standard deviations of the mean in a normal distribution?
95%
What % of values lie within 3 standard deviations of the mean in a normal distribution?
What % of values lie within 3 standard deviations of the mean in a normal distribution?
99.7%
For IQ scores with and , what range contains 68% of scores?
For IQ scores with and , what range contains 68% of scores?
85 to 115
For IQ scores with and , what range contains 95% of scores?
For IQ scores with and , what range contains 95% of scores?
70 to 130
If 95% of values lie within 2 SD of the mean, what % lie outside this region?
If 95% of values lie within 2 SD of the mean, what % lie outside this region?
5%
If 95% lie within 2 SD, what % are above 2 SD from the mean, using symmetry?
If 95% lie within 2 SD, what % are above 2 SD from the mean, using symmetry?
2.5%
What does a negative -value indicate about a data value?
What does a negative -value indicate about a data value?
It lies below the mean
For IQ with , , calculate for a score of 90.
For IQ with , , calculate for a score of 90.
What are the mean and standard deviation of the standard normal distribution?
What are the mean and standard deviation of the standard normal distribution?
,