Question

The following data set represents the ACT scores for students in Mrs. Miller's collegewriting class. Use the data set to answer the question below.18 27 24 2229 21 23 2525 31 19 21What is the mean ACT score for the class? (Round your answer to the nearest tenth,if necessary.)

Answer 1

The mean is of a dataset is calculated by the sum of all data and then divide it between the size of the data, the number of scores.

Let's start adding all scores:

$18+27+24+22+29+21+23+25+25+31+19+21=285$

Now the second step, count the number of points or the size of the dataset. There is 12 scores in total. Next, let's divide the sum 285 between 12:

$mean=\frac{285}{12}=23.75$

Finally, the question ask to round to the nearest tenth, hence the answer is 23.7