Based on historical data, your manager believes that 26% of the company's orders come from first-time customers. A random sample of 30 orders will be used to estimate the proportion of first-time-customers. What is the probability that the sample proportion is greater than 0.31? Use the normal table and

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A: or you can use Heron's Formula to find the area of the triangle.

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A: Given information: μ=151000σ=35000 n=77

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A: Yes your work is correct. Well done.

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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.