Question

It is widely believed that a person's level of fitness prior to undergoing corrective knee surgery is an important factor in the speed of rehabilitation following surgery. A study was undertaken with 24 randomly selected male subjects who were to undergo such surgery. The physical fitness status of each subject before the surgery was categorized as being: below average, average, or above average. Following surgery the number of days spent in physical therapy by each patient until fully rehabilitated was measured. If the null hypothesis for the ANOVA F test is that the population mean number of days spent in physical therapy are equal for all three physical fitness status. What is the alternative hypothesis?

          It is widely believed that a person's level of fitness prior to undergoing corrective knee surgery is an important factor in the speed of rehabilitation following surgery. A study was undertaken with 24 randomly selected male subjects who were to undergo such surgery. The physical fitness status of each subject before the surgery was categorized as being: below average, average, or above average. Following surgery the number of days spent in physical therapy by each patient until fully rehabilitated was measured.
If the null hypothesis for the ANOVA F test is that the population mean number of days spent in physical therapy are equal for all three physical fitness status. What is the alternative hypothesis?

Added by Keith L.

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