Question

practice using means of samples.
hours spent studying
11 8 9 4
6 6 2 6
14 0 3 7
5 4 5 2
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: Calculate row 1 sum

$11 + 8 + 9 + 4 = 32$

Step2: Find row 1 mean

$\frac{32}{4} = 8$

Step3: Calculate row 2 sum

$6 + 6 + 2 + 6 = 20$

Step4: Find row 2 mean

$\frac{20}{4} = 5$

Step5: Calculate row 3 sum

$14 + 0 + 3 + 7 = 24$

Step6: Find row 3 mean

$\frac{24}{4} = 6$

Step7: Calculate row 4 sum

$5 + 4 + 5 + 2 = 16$

Step8: Find row 4 mean

$\frac{16}{4} = 4$

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