Answered: Serum estradiol is an important risk…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Serum estradiol is an important risk factor for breast cancer in postmenopausal women. To better understand the etiology of breast cancer, serum-estradiol samples were collected from 25 premenopausal women (at about the same time period of the menstrual cycle) of whom 10 were Caucasian and 15 were African American. The data are shown in Table 7.3. The distribution of serum estradiol is usually highly skewed (especially for premenopausal women), and we are reluctant to assume normality.

Table 7.3 Serum estradiol and ethnicity in 25 premenopausal women, where 0=Caucasian and 1=African-American.

ID	Serum_estradiol	Ethic
1	94	0
2	54	1
3	31	0
4	21	1
5	46	1
6	56	0
7	18	1
8	19	1
9	12	1
10	14	0
11	25	0
12	35	1
13	22	1
14	71	0
15	43	1
16	35	1
17	42	1
18	50	1
19	44	1
20	41	0
21	28	0
22	65	0
23	31	0
24	35	1
25	91	1

7.1: What test can we use to compare the distribution of serum estradiol for Caucasian vs. African American women?
7.2 : Implement the test in Problem 7.1, and report a two-tailed p-value based on large sample methods.

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