A proposed null hypothesis states that there is no difference in the water consumption of households of two districts. The sample mean difference is found to be 8.5 liters, and the standard deviation of the distribution of the difference in sample means is 4.5 liters. Which statement is true?

Question

anonymous · Answer

The null hypothesis must be accepted if we choose the 68% confidence level.

The null hypothesis must be accepted if we choose the 95% confidence level.

The null hypothesis must be rejected if we choose the 99.7% confidence level.

The null hypothesis must be rejected if we choose the 100% confidence level.