The following data were collected as part of a quality control study for the analysis of sodium in serum; results are concentrations of Na+ in mmol/L. 140 143 141 137 132 157 143 149 118 145 Calculate the mean, the median, the range, the standard deviation, and the variance for this data. Table 2.1 contains the masses of NaOH pellets. One of the masses, 2.514 g, appears to be an outlier. Determine if this mass is an outlier using Q-test. 3.067 g 2.514 g 3.094 g 3.049 g 3.048 g 3.109 g 3.039 g 3.079 g 3.102 g 3. What is the 95% confidence interval for the amount of aspirin in a single analgesic tablet drawn from a population for which u is 250 mg and a2 is 25? 4. To compare two production lots of aspirin tablets, you collect samples from each and analyze them, obtaining the following results (in mg aspirin/tablet). Lot 1: 256 248 245 245 244 248 261 Lot 2: 241 258 241 244 256 254 Is there any evidence at a 0.05 that there is a significant difference in the variance between the results for these two samples? 5. An analysis of seven acetaminophen tablets from a population known to have a standard deviation of 5, gives the following results in mg aspirin per tablet: 246 249 255 251 251 247 250 What is the 95% confidence interval for the population's expected mean? 6. Suppose you are studying the distribution of zinc in a lake and want to know if there is a significant difference between the concentration of Zn at the sediment-water interface and its concentration at the air-water interface. You collect samples from six locations-near the lake's center, near its drainage outlet, etc.-obtaining the results (in mg/L) shown in the table. Using the data in the table shown below, determine if there is a significant difference between the concentration of Zn at the two interfaces at a -0.05. Location Air-Water Interface Sediment-Water Interface 1 0.430 0.415 2 0.266 0.238 3 0.457 0.390 4 0.531 0.410 5 0.707 0.605 6 0.716 0.609 Complete this analysis treating the data as (a) unpaired, and (b) paired. Briefly comment on your results.