All February Data was combined of 28 days of data
All August Data was combined of 31 days of data
August/ 2013
Mean: 79.032
Standard Deviation: 4.223
February/2013
Mean: 32.679
Standard Deviation: 8.188
August/2011
Mean: 80.226
Standard Deviation: 3.685
February/2011
Mean: 32.571
Standard Deviation: 7.772
August/2007
Mean: 79.227
Standard Deviation: 6.893
February/2007
Mean: 24.714
Stand: 9.404
1. Compute 99% confidence intervals for the average daily maximum temperature in February for each of the three years in which you collected data. How do they compare? Show all work.
2. Compute 99% confidence intervals for the average daily maximum temperature in August for each of the three years in which you collected data. How do they compare? Show all work.
3. Use the survey results to construct a 95% confidence interval estimate of the percentage of all adults who believe that there is a solid evidence of increasing temperature.
4. Identify the margin of error for this survey
5. Explain why it would or would not be okay for a newspaper to make this statement " Based on the results from a recent survey, the majority of adults believe that there is solid evidence of global warming"
6. Assume that you are a newspaper reporter, write a report of the survey results for your newspaper.
7. A common criticism of survey's is that the poll only a very small percentage of the population and therefore cannot be accurate. Is a sample of only 1501 adults taken from a population od 241,472,385 adults a sample size of that is too small? Write a brief explanation of why the sample size of 1501 is or is not too small.