Question

question 5 (1 point)
the scores for an exam in a math course are as follows:
65, 73, 60, 86, 88, 80, 92, 70
find the mean. round your answer to two decimal places.
your answer:
answer

Explanation:

Step1: Sum all the scores

$$65 + 73+60 + 86+88+80+92+70$$
$$=(65 + 73)+(60 + 86)+(88 + 80)+(92 + 70)$$
$$=138+146+168+162$$
$$=(138 + 146)+(168 + 162)$$
$$=284+330$$
$$=614$$

Step2: Count the number of scores

There are \(n = 8\) scores.

Step3: Calculate the mean

The mean formula is \(\bar{x}=\frac{\sum_{i = 1}^{n}x_{i}}{n}\). Substitute \(\sum_{i=1}^{n}x_{i}=614\) and \(n = 8\) into the formula: \(\bar{x}=\frac{614}{8}=76.75\)

Answer:

\(76.75\)