In order to make statistical inferences when testing a population proportion p, which of the following conditions verify that inference procedures are appropriate?

1) The data are collected using a random sample or random assignment.

2) The sample size is less than 10 percent of the population size.

3) np0≥10 and n(1−p0)≥10 for sample size n and hypothesized proportion p0.

1 only

2 only

3 only

2 and 3 only

1 2 and 3