# ec6 - The University of Hong Kong Department of Statistics...

This preview shows pages 1–2. Sign up to view the full content.

1 The University of Hong Kong Department of Statistics and Actuarial Science STAT0302 Business Statistics Semester 2 2009/2010 Example Class 6 Question 1. The following data show the average number of hours which six students studied per week and their grade-point index: x : Hours studied 15 28 13 20 4 10 y : Grade-point index 1.0 2.7 1.3 1.9 0.9 1.7 (a) Find the line of best fit for these data using: (i) the formulae, (ii) calculator. (b) Plot the data and draw the regression line on the same scatter diagram. (c) Predict the grade point index for a student who studies 20 hours per week. (d) Predict the grade point index for a student who studies zero hours per week. (e) Which prediction is more reliable (c) or (d)? Why? (f) Calculate the correlation coefficient using: (i) the formulae, (ii) calculator. (g) Calculate the Spearman rank correlation. 2. The monthly temperature and gas consumption between Jan 1997 to Dec 2000 in

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 05/02/2010 for the course STAT STAT0302 taught by Professor Prof.chiu during the Spring '09 term at HKU.

### Page1 / 2

ec6 - The University of Hong Kong Department of Statistics...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online