what is the difference between a point estimate and an interval estimate of a parameter

1. describe the following terms and give an example of each. a) point estimate, b) confidence interval, c) unbiased estimator, d) critical value, e) level of confidence, f) null hypothesis, g) type 1 error, h) hypothesis test, i) critical region, and j) maximum error of estimate 2. what is the difference between a point estimate and an interval estimate of a parameter? which is better? why? 3. what information is necessary to calculate a confidence interval? is the size of the population relevant when one is tetermining the sample size for a confidence interval? what is necessary to determine sample size?