An academic medical center surveyed all of its patients in 2002 to assess their satisfaction with medical care. Satisfaction was measured on a scale of 0 to 100, with higher scores indicative of more satisfaction. The mean satisfaction score in 2002 was 84.5. Several quality-improvement initiatives were implemented in 2003 and the medical center is wondering whether the initiatives increased patient satisfaction. A random sample of 125 patients seeking medical care in 2003 was surveyed using the same satisfaction measure. Their mean satisfaction score was 89.2 with a standard deviation of 17.4. Is there evidence of a significant improvement in satisfaction? Run the appropriate test at
An academic medical center surveyed all of its patients in 2002 to assess their satisfaction with
medical care. Satisfaction was measured on a scale of 0 to 100, with higher scores indicative of
more satisfaction. The mean satisfaction score in 2002 was 84.5. Several quality-improvement
initiatives were implemented in 2003 and the medical center is wondering whether the
initiatives increased patient satisfaction. A random sample of 125 patients seeking medical care
in 2003 was surveyed using the same satisfaction measure. Their mean satisfaction score was
89.2 with a standard deviation of 17.4. Is there evidence of a significant improvement in
satisfaction? Run the appropriate test at the 1% level of significanc
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