Question

the table below summarizes the birth weights (to the nearest pound) of a sample of 31 newborn babies.

number of bables	birth weight of each (in pounds)
7	6
14	7
7	8

find the mean birth weight of these 31 babies. round your answer to the nearest tenth.

□ pounds

Explanation:

Step1: Calculate total weight per group

$3 \times 4 = 12$, $7 \times 6 = 42$, $14 \times 7 = 98$, $7 \times 8 = 56$

Step2: Sum all total weights

$12 + 42 + 98 + 56 = 208$

Step3: Compute mean weight

$\text{Mean} = \frac{208}{31}$

Step4: Round to nearest tenth

$\frac{208}{31} \approx 6.7$

Answer:

6.7 pounds