Answer: p-value is 0.016.
Step-by-step explanation:
Since we have given that

Sample mean = 19.4
Sample size n = 50
Standard deviation = 2
We need to find the test statistic value which is given by

p-value is given by

Hence, p-value is 0.016.
Using the formula a(b+c) = ab + ac, then 7(2x-6) = 14x - 42. The answer is D.
The average rate of change between 1991 and 1996 is 40 million
<h3>How to determine the average rate of change between 1991 and 1996?</h3>
The given parameters are:
Population in 1991 = 1.5 billion
Population in 1996 = 1.7 billion
The average rate of change between 1991 and 1996 is calculated as:
Rate = (1.7 billion -1.5 billion)/(1996 - 1991)
Evaluate
Rate = 40 million
Hence, the average rate of change between 1991 and 1996 is 40 million
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