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The normal distribution - CCEA GCSE Statistics quiz quiz

13questions. Pick an answer and you'll see why right away.

  1. The normal distribution curve is:

  2. In a normal distribution, the mean, median and mode are:

  3. Approximately what percentage of data lies within one standard deviation of the mean?

  4. Approximately what percentage lies within two standard deviations of the mean?

  5. Approximately what percentage lies within three standard deviations of the mean?

  6. The spread of a normal distribution is controlled by the:

  7. About what percentage of a normal distribution lies above two standard deviations from the mean?

  8. Heights are normal with mean 170 cm and standard deviation 6 cm. The interval 164 cm to 176 cm covers about:

  9. Because the normal curve is symmetrical, the percentage in each tail is:

  10. A standardised score of +2+2 in a normal distribution corresponds to:

  11. Which data set is most likely to be approximately normal?

  12. Masses are normal with mean 50 g and standard deviation 5 g. About what percentage is below 45 g?

  13. The total area under a normal distribution curve represents: