In a large city, the population proportion of residents favoring an increase in electricity price is...

In a large city, the population proportion of residents favoring an increase in electricity price is P = 0.35. A random sample of n = 144. Use p to denote the sample proportion of residents favoring the increase in electricity price.

1. The mean (or expected value) of the sample proportion p is

2. The standard deviation of the sample proportion P is closest to

3. The probability that the sample proportion P is less than or equal to 0.40 is closest to

4. The probability that the sample proportion P is larger than 0.32 is closest to

5. The probability that the sample proportion P is larger than 0.38 is closest to

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orchestra answered 1 year ago

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