The data in the table below of Statistics group assignment results (in %) by a random sample of the results of 30 groups were recorded in the table below. 39 63 65 68 68 76 76 85 84 87 91 95 94 94 30 34 39 31 33 14 35 38 39 38 32 27 28 33 40 49 Required Tasks: a. Construct a frequency distribution and a relative frequency distribution for the data. b. Construct a cumulative frequency distribution and a cumulative relative frequency distribution for the data. c. Plot an Ogive for the data. d. If 50 is the pass mark, what proportion of the groups passed the assignment? e. What proportion of the data is more than 70?

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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.