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? 1)The population mean number of days spent in physical therapy is longer for below average than the other two groups. 2)The population mean number of days spent in physical therapy is shorter for above average than the other two groups. 3)The three population mean number of days spent in physical therapy are all different from each other. 4)Not all three population mean number of days spent in physical therapy are equal to each other.
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
1)The population mean number of days spent in physical therapy is longer for below average than the other two groups.
2)The population mean number of days spent in physical therapy is shorter for above average than the other two groups.
3)The three population mean number of days spent in physical therapy are all different from each other.
4)Not all three population mean number of days spent in physical therapy are equal to each other.
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