The graph below shows the total number of times Peter checked his phone from 8 a.m - Junior Cycle Mathematics - Question 4 - 2021
Question 4
The graph below shows the total number of times Peter checked his phone from 8 a.m. to 6 p.m. on a given day. For example, by 6 p.m. Peter had checked his phone a to... show full transcript
Worked Solution & Example Answer:The graph below shows the total number of times Peter checked his phone from 8 a.m - Junior Cycle Mathematics - Question 4 - 2021
Step 1
(i) By 2 p.m., the total number of times Peter had checked his phone was:
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
From the graph, we observe that by 2 p.m. Peter had checked his phone a total of 55 times. Thus, we would tick the box for 55.
Step 2
(ii) Peter did not check his phone at all from:
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
From the graph, Peter did not check his phone at all from 10 – 12 noon. Hence, we would select that option.
Step 3
(iii) Peter checked his phone most often from:
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Looking at the graph, it is evident that the period during which Peter checked his phone most often was from 12 – 2 p.m. Therefore, we would tick that box.
Step 4
(i) Use this formula to find the value of N when H is 8.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Using the formula, we have:
N=6imesH
Substituting H = 8:
N=6imes8=48
Thus, the total number of times Peter had checked his phone is 48.
Step 5
(ii) Do you think this is a reasonable estimate?
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
I believe this is not a reasonable estimate. Given that Peter has already checked his phone a cumulative total of 156 times estimated by using H = 24, this figure significantly exceeds his past behavior of checking 6-5 times per hour. Therefore, the estimate of 156 times seems unreasonable.
Join the Junior Cycle students using SimpleStudy...
