Question

students were asked how many hours during the weekend they studied for a monday exam. each row of the table represents one sample from the class. find the mean of each sample. mean of samples in row 1 mean of samples in row 2 mean of samples in row 3 mean of samples in row 4

Explanation:

Step1: Recall mean formula

The mean $\bar{x}=\frac{\sum_{i = 1}^{n}x_{i}}{n}$, where $x_{i}$ are the data - points and $n$ is the number of data - points. Here $n = 4$ for each row.

Step2: Calculate mean for row 1

$\bar{x}_1=\frac{11 + 8+9 + 4}{4}=\frac{32}{4}=8$

Step3: Calculate mean for row 2

$\bar{x}_2=\frac{6+6 + 2+6}{4}=\frac{20}{4}=5$

Step4: Calculate mean for row 3

$\bar{x}_3=\frac{14+0 + 3+7}{4}=\frac{24}{4}=6$

Step5: Calculate mean for row 4

$\bar{x}_4=\frac{5+4 + 5+2}{4}=\frac{16}{4}=4$

Answer:

Mean of samples in row 1: 8
Mean of samples in row 2: 5
Mean of samples in row 3: 6
Mean of samples in row 4: 4