(Solution Document) A survey of licensed drivers inquired about running red lights.


Someone please help me with STAT.


2. A survey of licensed drivers inquired about running red lights. One question asked, "Of every ten motorists who run a red light, about how many do you think will be caught?" The mean result for 934 respondents was x(bar)= 2 and the standard deviation was s = 1.91. For this large sample, s will be close to the population standard deviation ?, so suppose we know that ? = 1.91.


Give a 95% confidence interval (±0.01) for the mean opinion in the population of all licensed drivers:___ ± ___ .

The distribution of responses is skewed to the right rather than Normal.


3. Will it strongly affect the z confidence interval for this sample?

A. Yes

B. No

 







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