Identify the bias A newspaper designs a survey to estimate the proportion of the population willing to invest in the stock market. It takes a list of the 1000 people who have subscribed to the paper the longest and sends each of them a questionnaire that asks, “Given the extremely volatile performance of the stock market as of late, are you willing to invest in stocks to save for retirement?” After analyzing result from the 50 people who reply, they report that only 10% of the local citizens are willing to invest in stocks for retirement. Identify the bias that results from the following:

a. Sampling bias due to undercoverage

b. Sampling bias due to the sampling design

c. Nonresponse bias

d. Response bias due to the way the question was asked