Engineers at an oil refinery find out how easily gasoline evaporates by measuring its vapor pressure. As they make gasoline, they need to determine whether its vapor pressure is high enough. The standard deviation of the vapor pressure of the gasoline made by the refinery is always 0.03 (pounds per square inch). Which hypothesis test would be most appropriate for this task?

The most appropate hypothesis for this task would be: one sample Z test.

Explanation:

The one sample Z test is one of the most common and basic hypotethis test.

The formula for z test can be taken when the population is normally distributed and you have knwoledge of the standard desviation as in this case.

the money supply is the total amount of money available in the economy. how do changes in the money supply affect people and businesses?

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.