Emergency room arrivals in a large hospital showed the statistics below for 2 months. At?= .01, has the variance changed?

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Monthly rent paid by undergraduates and graduate students. Undergraduate Student Rents (n I 10) 840 770 850 680 720 780 750 690 1,040 670 Graduate Student Rents (n : 12) 1,120 950 960 840 730 890 780 860 960 880 880 840 Click here for the Excel Data File (8) Construct a 95 percent confidence interval for the difference of mean monthly rent paid by undergraduates and graduate students, using the assumption of unequal variances with Welch's formula for de (Do not round the intermediate calculations. Round your final answers to 3 decimal places. Negative values should be indicated by a minus sign.) The 95% confidence interval is from 207.179 0 to 46.488 9 (b) What do you conclude? We can conclude there is a significant difference in means for undergraduate and graduate rent. 0 We cannot conclude there is a significant difference in means for undergraduate and graduate rent