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cobyontiveros
30.10.2020 •
Mathematics
A normal distribution has a mean of 55 and a standard deviation of 10. How far away from the mean (z-score) is 40?
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Ответ:
(0.095, 0.165)
Step-by-step explanation:
Confidence interval :
Phat ± margin of error
Margin of Error = 0.035
Phat = x / n
Phat = 11 / 85 = 0.1294117
Hence,
Phat ± 0.035
Lower boundary = 0.1294117 - 0.035 = 0.0944
Upper boundary = 0.1294117 + 0.035 = 0.1644
(0.0944, 0.1644)