It seems that part of the information is missing in the question, specifically the scores for lab reports and homework assignments. Without this information, we cannot calculate the weighted mean for the student's chemistry grade. However, here is the formula for calculating weighted mean:
Weighted mean = (score1 x weight1) + (score2 x weight2) + ... + (scoren x weightn) / (weight1 + weight2 + ... + weightn)
Using the example given in the question, if we have the scores and weights for all four sources of the student's chemistry grade, we can plug them into the formula and find the weighted mean:
Weighted mean = (Lab reports score x 0.35) + (Homework score x 0.15) + (Midterm exam score x 0.25) + (Final exam score x 0.25) / (0.35 + 0.15 + 0.25 + 0.25)
Once we have all the necessary values, we can solve for the weighted mean.
84 Some teachers use weighted mean to gradesEach a weight based on importanceTo find a weighted meanmultiply each score by weight and add For examplea students chemestry grade is based on four sources 35% lab reports15% from , 25% the midterm examand 25% the exam What the weighted mean given the scores shown in the table Exam Exam 95 76 your Type
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