Data collection and Sampling - Measures of variability
7 important questions on Data collection and Sampling - Measures of variability
How do you call methods to determine the spread of data?
How do you call the difference between largest and smallest observations?
How do you call the sum of the squared differences of all the items of data in a sample, divided by one less than the number of items?
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How do you call a measure of variation?
How do you call the observation that for most bell-shaped distributions, about 68% of the data lie within one standard deviation of the mean, 95% within two standard deviations, and over 99% within 3 standard deviations?
How do you call the proportion of observations that lie within k standard deviations of the mean is at least 1 − 1/k2?
How do you call a histogram that is negatively skewed?
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