The dataset lowbwt contains information recorded for 100

The dataset lowbwt contains information recorded for 100 low birth weight infants born in two teaching hospitals in Boston. Measurements of systolic blood pressure are saved under the variable name sbp, while indicators of gender where 1 represents a male and 0 a female, are saved under the name sex.

 lowbwt

sheet 1

sbp sex tox grmhem gestage apgar5
43 Male No No 29 7
51 Male No No 31 8
42 Female No No 33 0
39 Female No No 31 8
48 Female Yes No 30 7
31 Male No Yes 25 0
31 Male Yes No 27 7
40 Female No No 29 9
57 Female No No 28 6
64 Female Yes No 29 9
46 Female No No 26 7
47 Female No Yes 30 6
63 Female No No 29 8
56 Female No No 29 1
49 Male No No 29 8
87 Male No No 29 7
46 Female No No 29 8
66 Female No No 33 8
42 Female Yes No 33 8
52 Female No No 29 7
51 Male No No 28 7
47 Female No No 30 9
54 Male No No 27 4
64 Male No No 33 9
37 Female No No 32 7
36 Male Yes No 28 3
45 Female No Yes 29 7
39 Male No No 28 7
29 Female No No 29 4
61 Female No No 30 3
53 Male No No 31 7
64 Female No No 30 7
35 Female No No 31 6
34 Male No No 29 9
62 Female No No 27 7
59 Female No No 27 8
36 Male No No 27 9
47 Female No No 32 8
45 Male No Yes 31 2
62 Female No Yes 28 5
75 Male Yes No 30 7
44 Male No No 29 0
39 Male No No 28 8
48 Female No Yes 31 7
43 Female Yes No 27 6
19 Female No Yes 25 4
63 Male No No 30 7
42 Male No No 28 6
44 Female No No 28 9
25 Female No No 25 8
26 Female No No 23 8
27 Male No No 27 9
35 Male No No 28 8
40 Male No No 27 7
44 Female No No 27 6
66 Male No No 26 8
59 Female No No 25 3
24 Female No No 23 7
40 Female No Yes 26 3
49 Female No No 24 5
53 Male Yes No 29 9
45 Female No No 29 9
50 Male No Yes 27 8
64 Male No No 30 7
48 Female No No 30 6
48 Female No Yes 32 4
58 Female Yes No 33 7
67 Female No No 27 8
40 Female No Yes 31 8
48 Female No No 26 8
36 Male No No 27 5
44 Male No No 27 6
53 Female Yes No 35 9
45 Female Yes No 28 6
54 Male No No 30 8
44 Male Yes No 31 2
42 Male No No 30 5
50 Female No No 27 0
48 Female No No 25 5
29 Female No Yes 25 5
30 Female No Yes 26 2
36 Female No No 29 0
44 Female No No 29 0
46 Female Yes No 34 9
51 Male Yes No 30 4
51 Male No No 29 5
43 Male Yes No 33 7
48 Male No No 30 5
52 Male No No 29 8
43 Male No No 24 6
42 Male Yes No 33 8
48 Male No Yes 25 5
49 Female Yes No 32 8
62 Male Yes No 31 7
45 Male No No 31 9
51 Female Yes Yes 31 6
52 Male No No 29 8
47 Male Yes No 32 5
40 Female Yes No 33 8
50 Female No No 28 7

Sheet 2

sbp
42 43 Male
39 51 Male Gender Mean SD Sample Size
48 31 Male Female 46.4643 11.1453 56
40 31 Male Male 47.8636 11.8058 44
57 49 Male
64 87 Male
46 51 Male 46.4643 47.8636
47 54 Male 11.1453 11.8058
63 64 Male 56 44
56 36 Male
46 39 Male
66 53 Male
42 34 Male
52 36 Male
47 45 Male
37 75 Male
45 44 Male
29 39 Male
61 63 Male
64 42 Male
35 27 Male
62 35 Male
59 40 Male
47 66 Male
62 53 Male
48 50 Male
43 64 Male
19 36 Male
44 44 Male
25 54 Male
26 44 Male
44 42 Male
59 51 Male
24 51 Male
40 43 Male
49 48 Male
45 52 Male
48 43 Male
48 42 Male
58 48 Male
67 62 Male
40 45 Male
48 52 Male
53 47 Male
45
50
48
29
30
36
44
46
49
51
40
50

Sheet 3

a). Compute a 95% confidence interval for the true mean systolic blood pressure of male low birth weight infants.
b). Compute a 95% confidence interval for the true mean systolic blood pressure of female low birth weight infants.
c). Do you think it is possible that both males and females have the same mean systolic blood pressure. Explain.

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