In march 2015, the public policy institute of california (ppic) surveyed 7525 likely voters living in california. in the survey, respondents were asked about global warming. ppic researchers are interested in the difference in viewpoints across racial/ethnic groups. ppic results show that 75% of latinos view global warming as a serious problem, and 46% of whites view global warming as a serious problem.

using the data from the survey, we calculate the sample difference in global warming viewpoints for latino respondents and white respondents to be 29% = 0.29. the 95% confidence interval based on this sample difference is (0.275, 0.305).

which of the following is a valid conclusion? check all that apply.

a) we are 95% confident that the proportion of latinos who view global warming as a serious problem is about 27.5% to 30.5% lower than the proportion of whites who view global warming as a serious problem.

b) we are 95% confident that the true difference in proportion of latinos who view global warming as a serious problem and whites who view global warming as a serious problem is 27.5% to 30.5%.

c) we are 95% confident that the difference between latino and white opinions about the severity of global warming is 29% with a margin of error of 1.5%.