Inferential Statistics (Leaving Cert Mathematics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What shape does a normal distribution form when data is arranged in a frequency distribution?
What shape does a normal distribution form when data is arranged in a frequency distribution?
Bell-shaped and symmetrical
What does standard deviation () measure in a normal distribution?
What does standard deviation () measure in a normal distribution?
How spread out data is from the mean
According to the empirical rule, what percentage of values lie within one standard deviation?
According to the empirical rule, what percentage of values lie within one standard deviation?
68%
What percentage of values lie within two standard deviations of the mean?
What percentage of values lie within two standard deviations of the mean?
95%
What percentage of values lie within three standard deviations of the mean?
What percentage of values lie within three standard deviations of the mean?
99.7%
If and , what is ?
If and , what is ?
70
If and , what range contains 68% of the distribution?
If and , what range contains 68% of the distribution?
[40, 50]
If and , what range contains 95% of the distribution?
If and , what range contains 95% of the distribution?
[84, 116]
If mean is 60 and 95% of values are between 48 and 72, what is ?
If mean is 60 and 95% of values are between 48 and 72, what is ?
6
If 68% of values fall within a certain range, what is this expressed as a probability?
If 68% of values fall within a certain range, what is this expressed as a probability?
0.68