if you take 5 quizzes and get scores of 95%, 95%, 80%, 85%, and 75%, how would you find your mean quiz…
if you take 5 quizzes and get scores of 95%, 95%, 80%, 85%, and 75%, how would you find your mean quiz score? a find the score that is in the middle. b add all the scores together and divide by the number of scores. c add 95 + 80 + 85 + 75 together and divide by 4. d identify the quiz score that appears most often.
Answer
Explanation:
Step1: Recall mean - formula
The formula for the mean (average) of a set of data values $x_1,x_2,\cdots,x_n$ is $\bar{x}=\frac{\sum_{i = 1}^{n}x_i}{n}$, where $\sum_{i=1}^{n}x_i=x_1 + x_2+\cdots+x_n$ and $n$ is the number of data - values.
Step2: Match with options
To find the mean of the quiz scores 95%, 95%, 80%, 85%, and 75%, we need to add all the scores together ($95 + 95+80 + 85+75$) and divide by the number of scores (5). Option B correctly describes the process of finding the mean.
Answer:
B. Add all the scores together and divide by the number of scores.