Scores

5 = very negative

1 = very positive

Regression sample mean

Strategy 1: Books excellent, rest at their mean

Strategy 2: Tutor support excellent, rest at their mean

Strategy 3: Website excellent, rest at their mean

Books score

2.52

1

2.52

2.52

Tutors score

2.02

2.02

1

2.02

Website score

1.90

1.90

1.90

1

Predicted satisfaction from knowledge (max = 7)

4.88

5.12

5.11

5.04