3. In the General Social Survey respondents are asked to rate their poliucal views on a seven- point scale, where I = extremely liberal. 4 = moderate. and 7 = extremely conservative. For the 1994 survey. a computer printout reports N 2879 Mean 4.171 Std Dev 1.390 Std Err 0.0259

a) Construct and interpret a 95% confidence interval for the mean political ideology.

b) Show the effect of increasing the confidence level, by constructing a 99% confidence interval

c) What assumption are you malang about the scale of measurement for political ideology. when you use the sample mean and standard deviation?