Use this information to answer the next three questions.

A consumer testing service tested whether the average baking time of whole wheat bread in gas ovens was less than the average baking time of whole wheat bread in electric ovens. Ten loaves of whole wheat bread were prepared and five were randomly assigned to be baked in the five randomly selected gas ovens and five were randomly assigned to be baked in the five randomly selected electric ovens.

5)What is the explanatory variable, and is it quantitative or categorical?

• baking time which is categorical
• type of bread which is quantitative
• type of oven (gas versus electric) which is quantitative
• baking time which is quantitative
• type of bread which is categorical
• type of oven (gas versus electric) which is categorical

6)A consumer testing service tested whether the average baking time of whole wheat bread in gas ovens was less than the average baking time of whole wheat bread in electric ovens. Ten loaves of whole wheat bread were prepared and five were randomly assigned to be baked in the five randomly selected gas ovens and five were randomly assigned to be baked in the five randomly selected electric ovens.

What is the response variable in this scenario, and is it quantitative or categorical?

type of bread which is quantitative

baking time which is categorical

baking time which is quantitative

type of oven (gas versus electric) which is quantitative

type of oven (gas versus electric) which is categorical

type of bread which is categorical

7)Which procedure should be used for this test?

• analysis of variance
• two-sample t-test for means
• one-sample z-test for proportion
• one-sample t-test for mean (but not matched pairs)
• chi-square test
• matched pairs t-test for mean difference
• two-sample z-test for proportions
• regression analysis