# Project #18426 - Statistics

This is 4 questions about statistics just the usual homework.

I need it to be done on SPSS or excel is fine, i need to see all work done.

And I need it completed by the 4th.

It looks like this :

Q1.

Samples of aircrew on long haul schedules are tested to assess the amount of time they spend in stage IV sleep. It has been hypothesized that individuals suffering from tiredness due to long haul work may spend less time per night in the deeper stages of sleep. The number of minutes spent in Stage IV sleep is recorded for sixty-one patients. The sample produced a mean of 48 minutes (sd=14 minutes) of stage IV sleep over a 24-hour period of time. Compute a 95 percent confidence interval for this data. What does this information tell you about a particular individual's stage IV sleep?

(40 points)

Q2.

Embry Riddle wants to know more about the knowledge of their Graduate students regarding international Aviation law. They are concerned that their students are uninformed in regards to international law from other countries. A standardized test is used to assess the students knowledge (national reported mean=65, sd=5). A sample of 30 students are tested (sample mean=58, standard error=3.2). Compute a 99 percent confidence interval based on this sample's data. How do these students compare to the national sample?

(30 points)

Q3.

Samples of our students from an applied experimental design class were polled regarding the number of hours they spent studying for the last exam. All students anonymously submitted the number of hours on a 3x5 card. There were 24 individuals in the section of the course polled. The data was used to make inferences regarding students taking other sections of the same course. Below is the data:

4.5

22

7.0

14.5

9.0

9.0

3.5

8.0

11.0

7.5

18.0

20.0

7.5

9.0

10.5

15.0

19.0

2.5

5.0

9.0

8.5

14.0

20.0

8.0

Compute 95% confidence intervals. What does this tell us?

and then this seperatley:

Effect of Different Diet Programs on Weight Loss: In an attempt to improve the fitness of a company's pilots with the goal of reducing health insurance costs, all were measured for height and weight to calculate their BMI. Those that were found to have a BMI over 25 were offered a weight loss program. Three weight loss programs were offered: diet alone, exercise alone, and diet plus exercise. They were given the chance to choose the program that suited them and their life style. Random samples of pilots’ weights were selected from each group. The number of pounds lost over a four week program are shown below.

Diet Exercise Both

2

7

10

3

9

9

3

9

8

2

6

10

1

8

11

0

10

7

1

9

8

2

11

9

3

7

11

2

6

9

(a) Perform a complete analysis and interpretation of the results. If appropriate, use diagrams or graphs. Ensure your answer is detailed in all aspects. Be sure to comment on the assumptions of the ANOVA and if there are any violations. Report statistics in APA format.

(b) Which weight loss program would you recommend to the pilots? Why?

 Subject Mathematics Due By (Pacific Time) 12/04/2013 12:00 am
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