Prob. 8.2.15- P-value method, normal as approx. to binomial., left-tailed test about a proportion

In this video, we solve problem 8.2.15-T from Essentials of Statistics, 6th edition, by Triola. Here, we're asked to use the P-value method to test a claim about a proportion and use the normal distribution as an approximation to the binomial distribution. The test happens to be a left-tailed test.