Question

QUESTION9 1 polnts Find the mildrange for the glven sample data. Bill kept track of the number of hours he spent exercising each week. The results for 15 weeks are shown below. Find the 7.0 70 70 70 78 8.0 6.8 85 85 70 8.7 70 80 9.0 7.8 O 7.75 O 7.8 O 790 O 22 QUESTION 10 1 poi Find the mean of the data summarized in the given frequency distribution. The test scores of 40 students are summarized in the frequency distribution below. Find the mean score. 5659 -15- 70-79 80-89 9 90-99) 5 O 633 O 66.8 O 745 O 70.3

Answer 1

9)

$MidRange=\frac{Max+Min}{2}=\frac{9+6.8}{2}=7.9$

Hence 3rd option is the correct option.

10)

Score	f	X	fX
50-59	15	54.5	817.5
60-69	6	64.5	387
70-79	5	74.5	372.5
80-89	9	84.5	760.5
90-99	5	94.5	472.5
TOTAL	40		2810

We know, Mean = $\frac{\sum fX}{\sum f}=\frac{2810}{40}=70.25\sim 70.3$

Hence 4th option is the correct option.