7. Rounding to the nearest integer, we are 95% confident that the mean anxiety level in the IBS population will fall between:

Question relate to the output for a one-way ANOVA, below

a) 13.48 and 16.72

b) 13.20 and 16.12

c) 11.15 and 13.85

d) 13.21 and 14.92

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Anxiety Descriptives 95% confidence Interval for mean Lower Upper N Mean Std. deviation Std error bound bound Minimum Maximum IBS 29 IBD 29 4.26233 14.6552 3.83849 Controls 30 12.5000 3.60794 15.1034 .79150 .71279 .65872 13.4821 16.7248 7.00 13.1951 16.1153 8.00 7.00 27.00 23.00 Total 88 14.0682 4.03090 .42970 11.1528 13.8472 13.2141 14.9222 7.00 21.00 27.00 ANOVA Anxiety Sum of squares af Mean square F Sig. Between Groups 114.850 2 57.425 3.758 .027 Within Groups 1298.741 85 15.279 Total 1413.591) 87 Anxiety LSD Multiple Comparisons 95% Confidence interval Mean (I) Iv conditions (J) ir conditions difference (1J) Std. error Sig. Lower bound Upper bound IBS IBD 44828 1.02652 .663 -1.5927 2.4893 Controls 2.60345 IBD IBS -44828 1.01793 1.02652 .663 -2.4803 .012 .5795 4.6274 1.5927 Controls 2.15517 1.01793 .037 .1313 4.1791 controls IBS -2.60345 1.01793 .012 -4.6274 -.5795 IBD -2.15517 1.01793 .037 -4.1791 -1313 The mean difference is significant at the 0.05 level.