Thursday

December 18, 2014

December 18, 2014

Posted by **azriel ed pagayunan** on Tuesday, October 11, 2011 at 9:32am.

Age (X) 18 26 39 48 53 58 24 50

Days (Y) 16 12 9 5 6 2 10 7

a. What is the null hypothesis?

b. What is the strength and the direction of relationship?

c. Is the relationship significant?

d. What proportion of the number of sick days can be explained by the age of the employee?

e. In a sentence or so, give an appropriate interpretation of the analysis results.

- STATISTICS 014 -
**MathGuru**, Tuesday, October 11, 2011 at 6:14pmUse the Pearson r.

To find if there is a statistically significant linear relationship between hours worked and error rate, use N-2 for degrees of freedom at the appropriate significance level for the test you are doing. Use a table for critical or cutoff values for a Pearson r. Compare the value from the table to the value you calculated using a formula for the Pearson r. If the value you calculate exceeds the critical value from the table, the null will be rejected. There will be a linear relationship in the population and the test will be statistically significant. If the value you calculate does not exceed the critical value from the table, then the null will not be rejected and you cannot conclude a linear relationship in the population.

I hope this brief explanation will get you started.

- STATISTICS 014 -
**MathGuru**, Tuesday, October 11, 2011 at 6:20pmCorrection - the first sentence should read as follows:

To find if there is a statistically significant linear relationship between age and number of sick days, use N-2 for degrees of freedom at the appropriate significance level for the test you are doing.

Sorry for any confusion.

**Answer this Question**

**Related Questions**

statistics - A manager states that in his factory, the mean number of days per ...

BIOSTATISTICS PLEASE HELP - exercise: The average number of sick days an ...

c++ - The distance between two cities is 500 miles. Let us call these cities as...

statistics - A company decides to investigate the amount of sick leave taken by ...

Answer - A company decides to investigate the amount of sick leave taken by its ...

statistics - Data on number of days of work missed and annual salary increase ...

Algebra - which oft the following types of data s not suited for display on a ...

math (please check answer) - Which of the following types of information is NOT ...

Statistics - 20. A study involves measuring the number of days absent from work ...

Scatter plots - Which of the following types of information is NOT suited for ...