Question

A program to reduce littering was introduced in Brisbane in August 2011. The amount of litter collected off the streets of six suburbs (average kilograms of litter per block per day) was measured during July 2011 before the program started and then again in July 2012 after the program had been in effect for one year. The results are as follows:

Suburb	July 2011	July 2012	Difference	Diff. – M	Deviation2
New Farm	9	2
Gap	10	4
Spring Hill	8	9
Red Hill	9	1
Indooroopilly	11	6
Toowong	12	4

Approximately, what is the estimated standard deviation of the distribution of means of difference scores?

Approximately, what is the observed value of the test statistic and do you retain or reject the Null Hypothesis?

Answer 1

Question is answered below.