The two-way relative frequency table shows the relative frequencies of 9- and 10-year-olds who prefer superhero a or b.

what percent of 9-year-olds prefer superhero a?

37.5%

Step-by-step explanation:

The question asks for "the percent of 9-year olds who prefer Superhero A"

[Note: Since the table is given in terms of decimal, we will do the problem in decimal and later change to percentage]

Add the 9-year olds row. We have:

Look at the cell under Superhero A & beside 9-year old. We see that it is

So we would divide this by total, to get,

To convert decimal into percentage, we multiply the decimal with 100 and then tag along the "%" sign. Hence, we have:

%

boxplot

mean, 40.6

step-by-step explanation: