# The other data which Todaro might have used to analyse the birth rate were: For one of the three…

The other data which Todaro might have used to analyse the

birth rate were:

For one of the three possible explanatory variables (in

class, different groups could examine each of the variables):

(a) Draw an XY chart of the data above and comment upon the

result.

(b) Would you expect a line of best fit to have a positive

or negative slope? Roughly, what would you expect the slope to be?

(c) What would you expect the correlation coefficient to be?

(d) Calculate the correlation coefficient, and comment.

(e) Test to see if the correlation coefficient is different

from zero.

»

The other data which Todaro might have used to analyse the

birth rate were:

For one of the three possible explanatory variables (in

class, different groups could examine each of the variables):

(a) Draw an XY chart of the data above and comment upon the

result.

(b) Would you expect a line of best fit to have a positive

or negative slope? Roughly, what would you expect the slope to be?

(c) What would you expect the correlation coefficient to be?

(d) Calculate the correlation coefficient, and comment.

(e) Test to see if the correlation coefficient is different

from zero. Use the 95% confidence level.

»