In a sample of 1901 patients who underwent a certain type of surgery, 22 experienced complications. Find a 90 confidence interval for the proportion of all those undergoing this surgery who experience complications.
A) 0.2105 to 0.2295 B) 0.2044 to 0.2356 C) 0.2011 to 0.2389 D) 0.2078 to 0.2322
Question 2
A percentage distribution is given below for the size of families in one U.S. city.
Size Percentage
2 43.5
3 23.5
4 19.6
5 8.5
6 3.2
7+ 1.7
A family is selected at random. Find the probability that the size of the family is 4 or more.
Round results to three decimal places.
A) 0.330 B) 0.134 C) 0.866 D) 0.196
Tubal ligation. To minimize the size of the incisions necessary, laparoscopic surgery may be used to
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How long does it take for 90% of a sample of strontium-90 (half-life of 28.8 years) to decay?