Answer:
66.600% to 68.600%
Explanation:
The formula for calculating confidence interval for a proportion is
p ± Z √(p(1-p)/n)
(p is p hat with ∧ over p)
p hat= number of events/ total number of attempts i.e. 25/37 = 0.676
Z=z
i.e. alpha = 1-0.9 (from 90%) = 0.10
alpha/2= 0.10/2 = 0.05
z value for area of 0.0500 is o.13 (from z table)
putting these values in the above formula
0.676 ± 0.13 √(0.676(1-0.676)/37)
= 0.676 ±0.13(0.0769387)
=0.676± 0.10002034387
0.676+ 0.10002034387= 0.68600 or 68.600%
0.676-0.10002034387= 0.665998 or 66.600%
hence CI is 66.600% to 68.600%
#1) How many women were diagnosed with ovarian cancer? 2000-2015?
Answer: Based on CDC data 313,905 cases of ovarian cancer. Each year, about 20,000 women in the United States get ovarian cancer. Among women in the United States, ovarian cancer is the ninth most common cancer and the fifth leading cause of cancer death, after lung and bronchus, breast, colorectal, and pancreatic cancers. Ovarian cancer causes more deaths than any other cancer of the female reproductive system, but it accounts for only about 3% of all cancers in women.
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