Statistics Quiz

Which of the following is the correct way of writing the null hypothesis?

• H0: μ1=μ2

• H0: μ1>μ2

• H0: μ1<μ2

• H0: μ1≠μ2

When do we reject H0?

• When p-value > α

• When p-value = α

• When p-value < α

• When p-value ≤ α

When do we failed to reject H0?

• When p-value ≥ α

• When p-value = α

• When p-value < α

• When p-value ≤ α

How do we phrase when the decision was to reject H0?

• There is no significant difference . . .

• There is a significant difference . . .

• There is not enough significant difference . . .

• There is enough significant difference . . .

A farmer would like to determine the effectiveness of two different fertilizers on the growth of rice grain. Fertilizer A resulted to a mean of 3.5cm growth rate while Fertilizer B resulted to a mean of 4.0 cm growth rate. The statistician analyzed the data and found out that the p-value of the t-test was 0.042. What can you conclude from the result?

• Fertilizer A is better than Fertilizer B.

• Fertilizer B is better than Fertilizer A.

• Fertilizer A and B have the same effect on growth rate.

• Not enough evidence was given to make a conclusion.