n addition to ratings, Mary wanted to know whether customers also purchase a pair of socks when they purchase their Prike running shoes. Mary collected the purchases of running shoes from 10 randomly selected store customers from last month. From the data available from the last 5 years of research, Mary determined that 35% of store customers buy a pair of socks when they purchase their Prike shoes. What is the probability that less than 8 customers out of the 10 customers surveyed by Mary buy a pair of socks together with the pair of shoes? Show all steps of your calculations, with clear justification where necessary, and include any formulas used. Round the numbers at each step to 4dp.

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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.