A group of doctors investigated sleep-related breathing disorders in adults with traumatic brain injuries (TBI). The respiratory disturbance index (RDI), which is the number of apneic and hypopneic episodes per hour of sleep, was used as a measure of severity of sleep apnea. An RDI of 5 or more indicates sleep-related breathing disturbances. The DIs for the females and males in the study are as follows. Use the technology of your choice to answer the following questions. Explain your answers. Complete (a) and (b) below.a. If you had to choose between the use of pooled t-procedures and nonpooled t-procedures here, which would you choose? O A. Pooled t-procedures, because there is no indication that the populations have nearly equal standard deviations. O B. Nonpooled t-procedures, because there is no indication that the populations have nearly equal standard deviations. O C. Nonpooled t-procedures, because there is a reasonable indication that the populations have nearly equal standard deviations. b. Is it reasonable to use the type of procedure that you selected in part (a)? O A. No, because the two sample sizes are large, and the data is Normally distributed. O B. No, because the two sample sizes are small, and the data for the males appears to have a potential outlier. O C. Yes. because the two sample sizes are small, and the data for the males appears to have a potential outlier.
A group of doctors investigated sleep-related breathing disorders in adults with traumatic brain injuries (TBI). The respiratory disturbance
index (RDI), which is the number of apneic and hypopneic episodes per hour of sleep, was used as a measure of severity of sleep apnea.
An RDI of 5 or more indicates sleep-related breathing disturbances. The DIs for the females and males in the study are as follows. Use
the technology of your choice to answer the following questions. Explain your answers. Complete (a) and (b) below.a. If you had to choose between the use of pooled t-procedures and nonpooled t-procedures here, which would you choose?
O A. Pooled t-procedures, because there is no indication that the populations have nearly equal standard deviations.
O B. Nonpooled t-procedures, because there is no indication that the populations have nearly equal standard deviations.
O C. Nonpooled t-procedures, because there is a reasonable indication that the populations have nearly equal standard deviations.
b. Is it reasonable to use the type of procedure that you selected in part (a)?
O A. No, because the two
O B. No, because the two sample sizes are small, and the data for the males appears to have a potential outlier.
O C. Yes. because the two sample sizes are small, and the data for the males appears to have a potential outlier.
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