Null and Alternative Hypothesis - Overall significance You are an analyst for a shoe company and you are testing whehter the factors Quality (Q), Colour (C) and lace type (L) have any impact on the sales (S) of a certain shoe model. What would be your null and alternative hypotheses with respect to overall significance? Null Hypothesis: Q=C=L=0, i.e. none of the individual factors affect the sales of the shoe Alternative hypothesis: At least one of Q,C,L is non zero. Null hypothesis: Q=C=0 Alternative hypotheis : At least one of Q,C is not zero