If a sample proportion is 0.55, which of the following could be a 90% confidence interval for

Question:

If a sample proportion is 0.55, which of the following could be a 90% confidence interval for the population proportion? Select all that apply.
(a) Lower bound: 0.50; Upper bound: 0.60
(b) Lower bound: 0.53; Upper bound: 0.59
(c) Lower bound: 0.52; Upper bound: 0.58
(d) Lower bound: 0.60; Upper bound: 0.70
(e) Lower bound: 0.45; Upper bound: 0.60

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