9. The empirical rule states that for a normal distribution:
• Approximately % of the data lies within 1 standard deviation from the mean
• Approximately % of the data lies within 2 standard deviations from the mean
• Approximately % of the data lies within 3 standard deviations from the mean
10. Write the correct symbol for each of the following:
a) Standard deviation of a sample
b) Mean of a population
c) Mean of a sample
d) Standard deviation of a population
9. The empirical rule states that for a normal distribution:
• Approximately "68.27\\%" of the data lies within 1 standard deviation from the mean
• Approximately "95.45\\%" of the data lies within 2 standard deviations from the mean
• Approximately "99.73\\%" of the data lies within 3 standard deviations from the mean
10.
a) Standard deviation of a sample "s"
b) Mean of a population "\\mu"
c) Mean of a sample "\\bar{x}"
d) Standard deviation of a population "\\sigma"
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