A survey of 200 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. The result of the survey is that 70 of the 200 students responded “yes.”
a) What is the value of the sample proportion p?
b) What is the standard error of the sample proportion?
c) Construct an approximate 95% confidence interval for the true proportion p by taking ± 2 SEs from the sample proportion.