In your biology class, your final grade is based on several things: a lab score, scores on two major tests, and your score on the final exam. There are 100 points available for each score. However,...

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Extracted text: In your biology class, your final grade is based on several things: a lab score, scores on two major tests, and your score on the final exam. There are 100 points available for each score. However, the lab score is worth 20% of your total grade, each major test is worth 24.5%, and the final exam is worth 31%. Compute the weighted average for the following scores: 79 on the lab, 87 on the first major test, 61 on the second major test, and 86 on the final exam. Step 1 Σ XW The weighted average can be calculated using where x is a data value and w is the weight assigned to W that data value. The summation notation means that we take the sum of the products of each data value and its respective weight. The problem states the lab score is worth 20%, each major test is worth 24.5%, and the final exam is worth 31%. The scores are 79 on the lab, 87 on the first major test, 61 on the second major test, and 86 on the final exam. Before performing any calculations, organize and prepare the data. Convert each percentage weight to a decimal weight by moving the decimal to the left two places. Then pair each data value with its respective weight and state the product. 1st Major Test 2nd Major Lab Final Exam Test Score 79 61 Weight (Decimal) 0.2 0.245 0.31 Product (0.2) 87(0.245) 61(0.245) 86(0.31) XW Submit Skip (you cannot come back)