this is the data

1 26.5

1 28.7

1 25.1

1 29.1

1 27.2

2 31.2

2 28.3

2 30.8

2 27.9

2 29.6

3 27.9

3 25.1

3 28.5

3 24.2

3 26.5

4 30.8

4 29.6

4 32.4

4 31.7

4 32.8

Q1: A test equal to (first average mean) with (average of other treatment averages) using a method

Contrasts :

Defining hypotheses: null hypothesis and alternative hypothesis

Calculating the value of the test statistic

Finding critical (tabular) values

Determine the area of rejection and acceptance of the null hypothesis

the decision

Conclusion