A real estate agent in the City of Winnipeg believes that house prices for the same square footage of house in the north-end of the city is less than in the south-end of city. To test this claim, the agent sampled 13 - 1800 sq. ft. homes from the north-end and 17 - 1800 sq. ft. homes from the south-end of the city and obtained the following data: North-End South-End mean = $287,000 mean = $395,000 standard deviation = $5200 standard deviation = $11,500 What is the margin of error for a 96% confidence interval for the true difference in mean house prices between North and South end homes? 7231.35 3439.72 3139.97 7746.31 7921.68