Answer:
137.67
Step-by-step explanation:
hello !
first, we find the midpoint of each interval in the score column (you can look for it by adding the two numbers and then dividing it by 2). then, we multiply the midpoint to the frequency:
1 - 7 is 4 = 4 * 17 = 68
8 - 10 is 9 = 9 * 15 = 135
11 - 15 is 13 = 13 * 13 = 169
16 - 20 is 18 = 18 * 6 = 108
23 - 35 is 29 = 29 * 6 = 174
36 - 50 is 43 = 43 * 4 = 172
now, we look for the mean, which we get by adding the sums and dividing the total with 6.
[tex]\frac{68+135+169+108+174+172}{6} = 137.6666667[/tex] or, when rounded to two decimal places, is equal to 137.67.
