The number of recorded earthquakes in California in a calendar year is normally distributed with a mean of 120, and a standard deviation of 15. a. A single year is randomly selected. Find the probability that the number of earthquakes in that year was greater than 100. b. A sample of five years was selected. Find the probability that the mean number of earthquakes in this sample was greater than 100.

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Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.