Examlex
Which of the following is the reason why the sub-Saharan population projections for the year 2025 have been scaled back from 1.33 billion to 1.05 billion people?
Normal Distribution
A bell-shaped curve that describes the spread of a characteristic throughout a population; it is symmetric and depicts that data near the mean are more frequent in occurrence.
Null Hypothesis
The hypothesis that there is no significant difference or effect, often denoted H0, in statistical hypothesis testing.
Mean MPG
The average miles per gallon achieved by a vehicle, calculated by summing the miles per gallon for all vehicles in the sample and dividing by the number of vehicles.
Test Statistic
A measure calculated from sample data used to determine the extent to which the null hypothesis should be rejected or not.
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