Calculate Cronbach's alpha reliability estimate for the following dataset which measures inattention ...

Calculate Cronbach's alpha reliability estimate for the following dataset which measures inattention.

Person

Item 1

Item 2

Item 3

Item 4

Sum Score

Chloe

1

4

3

2

Mallory

4

6

7

4

CJ

2

1

4

1

Hector

5

7

5

5

Henry

3

5

5

4

Variance