How the electrolytic capacitors made?

What does the term discrediting mean?

Use the empirical rule. the mean speed of a sample of vehicles along a stretch of highway is 70 miles per hour, with a standard deviation of 4 miles per hour. estimate the percent of vehicles whose speeds are between 66 miles per hour and 74 miles per hour. (assume the data set has a bell-shaped distribution.)

How does convection affect our atmosphere? our layers of earth? our oceans?