A random sample of sizen= 290 is taken from a population with population proportionP= 0.75.

a.	Calculate the expected value and the standard error for the sampling distribution of the sample proportion.(Round "expected value" to 2 decimal places and "standard error" to 4 decimal places.)

Expected value
Standard error

b.	What is the probability that the sample proportion is between 0.70 and 0.80?(Round z value to 2 decimal places, and final answer to 4 decimal places.)

Probability

c.	What is the probability that the sample proportion is less than 0.70?(Round z value to 2 decimal places, and final answer to 4 decimal places.)