The following frequency histogram represents the IQ scores of a random sample of seventh-grade students. IQs are measured to the nearest whole number. The frequency of each class is labeled above each rectangle. Use the histogram to answers parts (a) through (g). (a) How many students were sampled? students (b) Determine the class width. The class width is

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Q: C C C

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Q: From these  scores, find the interquartile range.  6, 1, 10, 3, 7

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A: *Answer:

Q: The following frequency histogram represents the IQ scores of a random sample of seventh-grade…

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Q: 93   68   71   87   85    88    76   79   78   87   81    81   83   89

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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.