An environmentalist wants to find out the fraction of oil tankers that have spills each month. Suppose a sample of 313 tankers is drawn. Of these ships, 235 did not have spills. Using the data, construct the 80 % confidence interval for the population proportion of oil tankers that have spills each month. Round your answers to three decimal places.

In 2000, for a certain region, 27.1% of incoming college freshman characterized their political views as liberal, 23.1% as moderate, and 49.8% as conservative. for this year, a random sample of 400 incoming college freshman yielded the frequency distribution for political views shown below. a. determine the mode of the data. b. decide whether it would be appropriate to use either the mean or the median as a measure of center. explain your answer. political view frequency liberal 118 moderate 98 conservative 184 a. choose the correct answer below. select all that apply. a. the mode is moderate. b. the mode is liberal. c. the mode is conservative. d. there is no mode.