Question

A new flow injection analysis enzymatic procedure for determining hydrogen peroxide in water was compared with a conventional method involving redox titration with potassium permanganate by applying both methods to samples for peroxide for pharmaceutical use. The data below gives the amount of hydrogen peroxide found in mg ml-1. Each value is the mean of four replicate measurements.

Sample No.                 Enzymatic Method                 Permanganate Method

1                                  31.1                                         32.6

2                                  29.6                                         31.0

3                                  31.0                                         30.3

Test whether the results obtained by the two different methods differ significantly.

Answer 1

Solution:

Descriptive statistics is

The hypothesis can be defined as:

Where and are the means of Enzymatic Method and permanganate Method.

two sample T- test will be used to test whether the results obtained by the two different methods differ significantly or not.

tets statistics is

Since |t| is less than t-critical value so, fail to reject the null hypothesis. Therefore, there is not enough evidence to conclude that there is a significant difference between the Enzymatic Method and Permanganate Method.