Year 11 Maths - General
Investigating Relationships Between Two Numerical Variables
Statistical Investigation
ACCOUNT REQUIRED
Unlock all 1 questions & worked solutions
You're viewing a free preview. Create an account to access the complete question set, step-by-step solutions, and progress tracking.
All Questions
Access the full question set for every topic.
Worked Solutions
Step-by-step explanations for every answer.
Track Progress
Mark questions right or wrong and monitor your growth.
It's Free
No credit card required - sign up in under a minute.
Questions
Question 1
11628
\begin{array}{|l|c|c|c|c|c|c|c|c|} \hline \text { Number of minutes }(\mathrm{x}) & 1 & 3 & 4 & 7 & 10 & 12 & 14 & 15 \\ \hline \text { Number of calls }(\mathrm{y}) & 11 & 9 & 10 & 6 & 8 & 4 & 3 & 1 \\ \hline \end{array} A study shows the more calls a person makes on their mobile phone, the less time they spend on each call.
a) The correlation coefficient \((r)\) is?
b) The correlation coefficient in part a) shows that?
c) The equation of the line of best fit is?
d) If 5 calls are made then the number of minutes for each call is?
e) If 5 minutes were used for each call then the number of calls would be?
