Problem 3) Lead concentrations in the eggshells of California condors have a mean of 1.8 ppm and a standard deviation of 0.3 ppm. The contamination levels of eggshells are classified as "low" if the lead concentration is below 1.0 ppm, “moderate" if the lead concentration falls between 1.0 ppm and 2.4 ppm, and "high" the lead concentration is above 2.4. Assuming that the lead concentrations of eggshells follows a normal distribution, answer the following questions. (Hint* The categories of Low, Moderate, and High can help you identify the boundaries of each interval. For example, the boundaries of Low are – ∞ to 1.0.) What is the percentile of an eggshell with a lead concentration of 2.3 ppm? a. 81st b. 93rd с. 86h d. 95th What lead concentration corresponds to the 79th percentile? a. 2.04 ppm b. 2.53 ppm c. 2.43 ppm d. 2.76 ppm What proportion of eggshells are predicted to fall into the "moderate" range? а. 0.76 b. 0.97 c. 0.66 d. 1.82

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.