Question

Help I need help with the chart the most!!!

Answer 1

(a) and (b) looks correct

(c) Here's how my table looks like:

15    -18      324
27    -6       36
28    -5       25
34     1         1
42     9        81
52     19      361
           SUM 828

(d) Take the sum of 828 and divide it by 6 to get 138.  Now take the square root of 138 to get the standard deviation:

sqrt(138) ≈ 11.75