A tool company claims that the mean number of defective screws they produce per box is 72. The mean number of defective screws in 100 randomly chosen boxes was found to be 76, with a standard deviation of 19. Test this hypothesis.

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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.