A sample of 65 people will be asked.
If 20 teachers and 45 pupils were asked, and 70% of the teachers and the pupils wanted a light brown schoolhouse, what percentage of the population could be expected preferring light brown?
2007-05-30 06:01:55 · 2 answers · asked by stacy s 1 in Science & Mathematics ➔ Mathematics
the answer is 17.6% how??
2007-05-30 06:18:21 · update #1
If the sample is a fair (unbiased) sample, then the percentage found from the sample is the same as the percentage expected of the population. Designing an experiment, i.e., for taking the samples, is the subject of very large, complex textbooks on the design and analysis of experiments.
PS: The answer you give, 17.6%, is absolutely wrong for what you asked. Perhaps you copied the question wrong. Please go back and reread the question from the textbook and then rewrite it in Answers word for word.
2007-05-30 06:15:38 · answer #1 · answered by oldprof 7 · 0⤊ 0⤋
(800+40)*.7=588
2007-05-30 13:09:31 · answer #2 · answered by Anonymous · 0⤊ 0⤋