Fuel oil is a common source of heating in the Northeast. Do more than 50% of households use fuel oil in this region? Conduct a Single Proportion Hypothesis Test to answer this question. The Northeast region is represented by REGIONC == 1. You will need to extract this data and calculate the proportion of fuel oil use by using the following equation: pfo=#offueloilvalues>0total#values.

• Provide a null and alternative hypotheses

California and Texas are the two most populous states in the US. Do households in California pay more, on average, for electricity than households in Texas? Conduct a Differences in Means Hypothesis Test to answer this question. You will need to extract the households for California and Texas, which are represented by REPORTABLE_DOMAIN == 26 and REPORTABLE_DOMAIN == 21, respectively.

• Provide a null and alternative hypotheses

Generally, households in Pennsylvania will use natural gas for heating and electricity for everything else, including air conditioning. In 2009, did Pennsylvanian households spend more money on electricity than natural gas? Conduct a PAIRED Mean of Difference Hypothesis Test to answer this question. You will need to extract the households for Pennsylvania, which are represented by REPORTABLE_DOMAIN == 5.

• Provide a null and alternative hypotheses