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madelynreynolds4757
30.11.2019 •
Mathematics
In a random sample of 70 people, it was found that 44 of them were fans of the new york yankees. what is the margin of error for the true proportion of all individuals who are fans of the new york yankees? . a. 0.0088 . b. 0.058. c. 0.063. d. 0.116. e. 0.173
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Ответ:
z * √[p (1-p) ÷ n]
where:
z = values for selected confidence level
p = sample proportion
n = sample size
Since the confidence level is not given, we can only solve for the
√[p (1-p) ÷ n] part.
p = 44/70
n = 70
√[44/70 (1 - (44/70) ÷ 70]
√[0.6286 (0.3714)] ÷ 70
√0.2335 ÷ 70
√0.0033357 = 0.05775 or 0.058 Choice B.
Ответ:
B - A=(x+20)(x+10) - 12
Step-by-step explanation: