# Question: For each of the four pollutants construct a boxplot for

For each of the four pollutants, construct a boxplot for the values for Year 1 to verify that the assumptions for constructing a confidence interval are satisfied.

## Relevant Questions

Construct a 95% confidence interval for the mean level of each pollutant for the Year1. 3. Is it reasonable to conclude that the mean levels in Year 1 were lower than the baseline levels for some or all of the pollutants? ...Crackers: Boxes of crackers are filled by a machine. The weights of a random sample of 25 boxes of crackers have standard deviation s = 5 grams. Assume the weights are normally distributed. Can you conclude that the ...Household size: For the past several years. The mean number of people in a household has been declining. A social scientist believes that in a certain large city, the mean number of people per household is less than 2.5. To ...For some records, marked with a *. the record temperature occurred more than once. In these cases, only the most recent year is listed. Explain how this might cause the mean to be greater than the midpoint of 1942, even if ...Interpret computer output: The following output from MINI TAB presents a confidence interval for the mean difference between matched pairs. a. Find the point estimate of pd. b. How many degrees of freedom are there? c. Fill ...Post your question