QUES TION 8 Your local running club has its own track and keeps accurate records

Question

QUES TION 8 Your local running club has its own track and keeps accurate records of each member's age and individual best lap time around the track, so members can make comparisons with their peers. Here are graphs of these data Gnph A Gragh B 480 1 3 75 3 00 2.26 25037.5 600 0 10 20 30 40 50 00 Gragh C Gmph D 5.0 10 203.04 Suppose you want to show a group of now members the disthbution of ages within the group. Which of the four graphs would you use? - A Graph 8 O A Graph tB O B Graph C C Graph A o D Graph D

Explanation / Answer

(8)

Since you want to show the distribution of ages within the group, so a bar chart should be used here which shows the frequency of each group.

So the correct answer is graph A

(9)

This histogram is used to display the distribution of scores obtained for a group of 10 students. The maximum marks of the test is 10.

In this case the horizontal axis is showing the scores on the test, while the vertical axis shows the number of students obtaining a particular score.

(10)

As we can see from the histogram, only 2 students scored higher than 4 marks, one of them obtained marks in the range 6-7, and the other obtained marks in the range 8-9.

So the percent of students receiving score higher than four is: (2/10)*100 = 20%

(11)

In this case, the 16 hospital rooms constitute the observational unit, because this is the group on which the experimental study is being performed.

(12)

Response variable shows the effect which the treatment had on the groups receiving it.

Since we are interested in the contamination level, so the response variable in this case is the number of bacterial colonies counted.

I have answered 5 questions, according to chegg policy please don't post more than 4 subparts on a single question.

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