Try It Use what you just learned about solving expressions with variables to lve these problems. Show your work on a separate sheet of paper. A Martina is 3 inches less than twice as tall as her little brother. Write an expression for Martina's height. How tall is Martina if her little brother is 28 inches tall? Tracy has 5 cans of vegetable juice in her refrigerator. Four of the cans each have 6 ounces of juice. Write an expression for the total ounces of juice Tracy has in her refrigerator. If the fifth can has 12 ounces, what is the total ounces of juice Tracy has? 18 Brian says that the expression 8n + 2 is equal to 83 when n = 1. Explain why Brian's answer is incorrect.

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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.