Biostatistics2

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Birth Weight (kg)

Gestation Age

Hospital of birth

 

Birth Weight

Gestation age

Hospital of Birth

(kg)

(weeks)

 

 

(kg)

(Weeks)

 

1.4

30

A

 

1

29

C

0.9

27

B

 

1.4

33

C

1.2

33

A

 

0.9

28

A

1.1

29

C

 

1

28

C

1.3

35

A

 

1.9

36

B

0.8

27

B

 

1.3

29

B

1

32

A

 

1.7

35

C

0.7

26

A

 

1

30

A

1.2

30

C

 

0.9

28

A

0.8

28

A

 

1

31

A

1.5

32

B

 

1.6

31

B

1.3

31

A

 

1.6

33

B

1.4

32

C

 

1.7

34

B

1.5

33

B

 

1.6

35

C

1

27

A

 

1.2

28

A

1.8

35

B

 

1.5

3

B

1.4

36

C

 

1.8

34

B

1.2

34

A

 

1.5

34

C

1.1

28

B

 

1.2

30

A

1.2

30

B

 

1.2

32

C

 

 

 

 

 

  1. Consider the data in listed in the table above.

 

    1. Assuming population variances are equal; construct an appropriate 95% confidence interval for the difference in mean Gestation Age between infants born in Hospital B and Hospital C. 
    2. Provide an interpretation of the interval in part a.
    3. Assuming population variances are not equal; construct an appropriate 95% confidence interval for the difference in mean Gestation Age between infants born in Hospital A and Hospital B.
    4. Assuming the population variances are equal, construct an appropriate 90% confidence interval for the difference in mean Birth Weight between infants born in Hospital A and Hospital C.
    5. Provide an interpretation of the interval in part d.

 

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