the average household size in the US is 2.63. Fernanda thinks the average household in her town is bigger than this. She surveys 20 households in her town. In her sample the average household size is 2.9 with a standard deviation of .9. What analysis should she do to find out if the whole population of households in her town has a mean size that is greater than the US average of 2.63? one sample z-test one sample t-test one sample p-test Histogram test