#45.

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 best conclusion for this problem is:

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 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.

#46.

Whenever we reject thenull hypothesis, as researchers what type of error are we most concerned that we may have made?

Standard error

Null hypothesis error

Alternative hypothesis error

Type II statistical error

Type I statistical error

#47.

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?

Calculate the 99% confidence interval.The mean that you will use in this calculation is ____:

4.60

3.20

4.75

2.60

1.82

#48.

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 critical value you will use for the 99%confidence interval?

+/- 1.65

+/- 1.70

+/- 1.96

+/- 2.33

+/- 2.58