reading tests are compared for two students. sara got 98, 100, 65, 78, 98, 46, 100, 100, 45, and 50 on her…

reading tests are compared for two students. sara got 98, 100, 65, 78, 98, 46, 100, 100, 45, and 50 on her reading test. lee got 97, 67, 89, 99, 100, 45, 79, 89, 58, and 67 on his reading test. what is the mean of saras reading test? what is the mean of lees reading test?

reading tests are compared for two students. sara got 98, 100, 65, 78, 98, 46, 100, 100, 45, and 50 on her reading test. lee got 97, 67, 89, 99, 100, 45, 79, 89, 58, and 67 on his reading test. what is the mean of saras reading test? what is the mean of lees reading test?

Answer

Explanation:

Step1: Recall mean formula

The mean $\bar{x}=\frac{\sum_{i = 1}^{n}x_{i}}{n}$, where $x_{i}$ are data - points and $n$ is the number of data - points.

Step2: Calculate sum and $n$ for Sara

For Sara, $n = 10$, and $\sum_{i=1}^{10}x_{i}=98 + 100+65 + 78+98+46+100+100+45+50=780$. Then, $\bar{x}_{Sara}=\frac{780}{10}=78$.

Step3: Calculate sum and $n$ for Lee

For Lee, $n = 10$, and $\sum_{i = 1}^{10}x_{i}=97+67+89+99+100+45+79+89+58+67 = 790$. Then, $\bar{x}_{Lee}=\frac{790}{10}=79$.

Answer:

Sara's mean: 78 Lee's mean: 79