1. In the general population, patients who are recovering from bronchial pneumonia normally take a mean (average) of 4.75 days toleave the hospital, with apopulation standard deviationof 1.82 days.Medical personnel at a hospital are trying a newmedication that is designed to ease breathing during recovery. What is not currently known is whether the new medication willimpact duration of hospital stay. The first sample of 25 patients (n=25) to whom this medication was administered werereleased from the hospital in a mean (average) of 2.60 days. Based on this result, should the hospital conclude that there isasignificant differencein duration of hospital stay because of the new medication?

For this problem, the correct sign for the critical value should be:

2.In the general population, patients who are recovering from bronchial pneumonia normally take a mean (average) of 4.75 days toleave the hospital, with apopulation standard deviationof 1.82 days.Medical personnel at a hospital are trying a newmedication that is designed to ease breathing during recovery. What is not currently known is whether the new medication willimpact duration of hospital stay. The first sample of 25 patients (n=25) to whom this medication was administered werereleased from the hospital in a mean (average) of 2.60 days. Based on this result, should the hospital conclude that there isasignificant differencein duration of hospital stay because of the new medication?

Which of the following is the critical value associated with an alpha level of .05 that you should use to evaluate the null hypothesis?(Use your tables.)

1.65

1.70

1.96

2.58

2.60

3.In the general population, patients who are recovering from bronchial pneumonia normally take a mean (average) of 4.75 days toleave the hospital, with apopulation standard deviationof 1.82 days.Medical personnel at a hospital are trying a newmedication that is designed to ease breathing during recovery. What is not currently known is whether the new medication willimpact duration of hospital stay. The first sample of 25 patients (n=25) to whom this medication was administered werereleased from the hospital in a mean (average) of 2.60 days. Based on this result, should the hospital conclude that there isasignificant differencein duration of hospital stay because of the new medication?

The most appropriate null hypothesis (in words)should be:

There is a significant difference in the duration of hospital stay when patients administered the new medication are compared to the general population of patients not receiving this medication.

There is no significant difference in the duration of hospital stay when patients administered the new medication are compared to the general population of patients not receiving this medication.

Duration of hospital stay is not significantly increased for patients administered the new medication compared to the general population of patients not receiving this medication.

Duration of hospital stay is significantly decreased for patients administered the new medication compared to the general population of patients not receiving this medication.

4.In the general population, patients who are recovering from bronchial pneumonia normally take a mean (average) of 4.75 days toleave the hospital, with apopulation standard deviationof 1.82 days.Medical personnel at a hospital are trying a newmedication that is designed to ease breathing during recovery. What is not currently known is whether the new medication willimpact duration of hospital stay. The first sample of 25 patients (n=25) to whom this medication was administered werereleased from the hospital in a mean (average) of 2.60 days. Based on this result, should the hospital conclude that there isasignificant differencein duration of hospital stay because of the new medication?

The most appropriate alternative hypothesis (in words)would be:

There is no significant difference in the duration of hospital stay when patients administered the new medication are compared to the general population of patients not receiving this medication.

There is a significant difference in the duration of hospital stay when patients administered the new medication are compared to the general population of patients not receiving this medication.

Duration of hospital stay is significantly decreased for patients administered the new medication compared to the general population of patients not receiving this medication.

Duration of hospital stay is significantly increased for patients administered the new medication compared to the general population of patients not receiving this medication.

5.In the general population, patients who are recovering from bronchial pneumonia normally take a mean (average) of 4.75 days toleave the hospital, with apopulation standard deviationof 1.82 days.Medical personnel at a hospital are trying a newmedication that is designed to ease breathing during recovery. What is not currently known is whether the new medication willimpact duration of hospital stay. The first sample of 25 patients (n=25) to whom this medication was administered werereleased from the hospital in a mean (average) of 2.60 days. Based on this result, should the hospital conclude that there isasignificant differencein duration of hospital stay because of the new medication?

What is the value of the standard error?

0.36

0.54

1.19

2.10

4.60