2. The following data give the household power (in kW.) usage of two areas in Selangor. Kajang 19.8 22.1 21.5 20.9 22.0 21.0 22.3 21.0 20.3 20.9 Bangi 23.2 22.0 22.2 21.2 21.6 21.6 21.9 22.0 22.9 22.8...

2nd

Extracted text: 2. The following data give the household power (in kW.) usage of two areas in Selangor. Kajang 19.8 22.1 21.5 20.9 22.0 21.0 22.3 21.0 20.3 20.9 Bangi 23.2 22.0 22.2 21.2 21.6 21.6 21.9 22.0 22.9 22.8 Assuming the variances for each group are the same, demonstrate any evidence at the 5% level to suggest that the differences power usage between the two area? (CO2, C3, PO1) 3. Researchers have conducted a survey of 1600 coffee drinkers asking how much coffee they drink in order to confirm previous studies. Previous studies have indicated that 72% of Malaysian drink coffee. The results of previous studies (Left) and the survey (Right) are below. At a = 0.05, construct enough evidence to conclude that the distributions are the same? (CO2, C3, PO1) Frequency Response 2 cups per week 1 cup per week 1 cup per day 2+ cups per day % of coffee drinkers 15% 13% Response 2 cups per week 1 cup per week 1 cup per day 2+ cups per day 206 193 27% 462 45% 739