An apartment hunter is shopping for either a one-bedroom or two-bedroom apartment in different apartment buildings. She wants to estimate the additional amount she would have to pay, on average, for a two-bedroom apartment versus a one-bedroom apartment. The table shows the prices, in dollars, for one- and two-bedroom apartments from the nine buildings she visited.   What is the 99% confidence interval for the true mean difference between two-bedroom and one-bedroom apartments for apartment buildings like the ones in the sample? A. 2 samp t-int 99% B. (106.12, 658.32) C. (198.46, 565.99) D. (255.93, 508.51) E. 2 samp t-int 95%

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