Question

Refer to the following partial ANOVA results from Excel (some information is missing).

Answer 1

Answer:

a) 4

Step-by-step explanation:

Take the equation:

x + 1483 = 2113.833

Solve for x:

x = 2113.833 - 1483

x = 630.833

To find df, take the equation:

$\frac{x}{y} = 210.2778$

Where x = 630.833

$\frac{630.833}{y} = 210.2778$

Solve for y:

$y = \frac{210.2778}{630.833}$

$y = 2.9999$

y ≈ 3

Take number of treatments = k

Degrees of freedom, df, of numberof treatments = k - 1

Therefore,

Where df = 3, we have:

k - 1 = 3

Solve for k:

k = 3 + 1

k = 4

The number of treatment groups is 4