In a study of cell phone usage and brain hemispheric​ dominance, an Internet survey was​ e-mailed to 6965 subjects randomly selected from an online group involved with ears. There were 1318 surveys...

In a study of cell phone usage and brain hemispheric​ dominance, an Internet survey was​ e-mailed to

subjects randomly selected from an online group involved with ears. There were

surveys returned. Use a 0.01 significance level to test the claim that the return rate is less than​ 20%. Use the​ P-value method and use the normal distribution as an approximation to the binomial distribution.

Identify the null hypothesis and alternative hypothesis.