A political pollster randomly selects a sample of 100 voters each day for 8 successive days and asks how many will vote for the incumbent. The pollster wishes to see if the percentage favoring the incumbent candidate is too erratic. Which of the following would be the most appropriate analysis to perform?
A) multiple linear regression
B) exponential smoothing
C) construct a p-chart
D) perform a Levene's test

Question

Quizplus · Accepted Answer

The pollster is interested in determining if the percentage of voters favoring the incumbent candidate is too erratic. The appropriate analysis in this case is to construct a p-chart, which is a control chart used to monitor the proportion of defective items in a sample. In this case, the proportion of voters favoring the incumbent candidate is being monitored over time. A p-chart will help determine if the proportion is within control limits or if there are any unusual patterns or trends in the data. Multiple linear regression and Levene's test are not appropriate for this scenario, and exponential smoothing is not applicable since there is no time series data being analyzed.

A Political Pollster Randomly Selects a Sample of 100 Voters