Chris is investigating the relationship between the length of time an employee has worked at his company, $x\,$ years, and the time it takes that employee to complete a particular task, $y\,$ hours.

Chris records the time taken by a random sample of 12 employees. The product moment correlation coefficient between $x\,$ and $y\,$ for this sample is -0.47.

For $n = 12$ , the critical value for a one-tailed test at the 5% level for the population correlation coefficient is 0.4973.

Carry out a hypothesis test at the 5% significance level to determine whether there is a negative correlation between the length of time an employee has worked at the company and the time taken to complete the task.

Chris is investigating the relationship between the length of time an employee has worked at his company, $x\,$ years, and the time it takes that employee to complete a particular task, $y\,$ hours.

Chris records the time taken by a random sample of 12 employees. The product moment correlation coefficient between $x\,$ and $y\,$ for this sample is -0.47.

For $n = 12$ , the critical value for a one-tailed test at the 5% level for the population correlation coefficient is 0.4973.

2.2.2 Scatter diagrams and correlation

Question 25

Markscheme

2.2.2 Scatter diagrams and correlation

Question 25

Markscheme

2.2.2 Scatter diagrams and correlation

Question 25

2.2.2 Scatter diagrams and correlation Questions

2.2.2 Scatter diagrams and correlation

Question 25

2.2.2 Scatter diagrams and correlation Questions