Question

find the mean for the following group of data items.
74, 71, 73, 66, 71, 77
the mean is (type an integer or a decimal.)

Explanation:

Step1: Calculate the sum of data items

$$74 + 71+73 + 66+71+77$$
$$=(74 + 71)+(73 + 66)+(71 + 77)$$
$$=145+139+148$$
$$=284+148$$
$$=432$$

Step2: Calculate the number of data items

There are \(n = 6\) data items.

Step3: Calculate the mean

The formula for the mean \(\bar{x}=\frac{\sum_{i = 1}^{n}x_{i}}{n}\), so \(\bar{x}=\frac{432}{6}=72\)

Answer:

\(72\)