Schools and museums: Do people who are interested in environmental issues visit museums more often than people who are not? The General Social Survey asked 990 people how interested they were in environmental issues, and how often they had visited a science museum in the past year. The following table presents the results.   Number of Visits None One More Than One Very interested 331 96 40 Moderately interested 347 57 25 Not interested   70 15   9 Can you conclude that the number of visits to a science museum is related to interest in environmental issues? Use the α = 0.01 level of significance.

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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.