Answer:
The correct option is (C).
Step-by-step explanation:
A null hypothesis is a sort of hypothesis used in statistics that intends that no statistical significance exists in a set of given observations.
It is a hypothesis of no difference.
It is typically the hypothesis a scientist or experimenter will attempt to refute or discard. It is denoted by H₀.
Whereas the alternative hypothesis is a contradicting statement tot he null hypothesis. It is denoted by Hₐ.
In this case we need to test whether the average age of online consumers has increased or not.
From previous data we know that the average age of online consumers a few years ago was 24.1 years.
A one-sample mean test can be used to determine whether the mean age has increased or not.
The hypothesis for the test can be defined as follows:
<em>H₀</em>: The average age of online consumers is 24.1 years, i.e. <em>μ</em> = 24.1.
<em>Hₐ</em>: The average age of online consumers is more than 24.1 years, i.e. <em>μ</em> > 24.1.
Thus, the correct option is (C).
The answer to the problem is 7 and here's why:
To answer this problem, it’s best to work backwards (start at the end and work towards the beginning). If we know that something plus 17 equals 22, then we can represent this as x + 17 = 22. Solving the equation algebraically, we find that x = 5 (this is done by isolating x on one side of the equation, so by subtracting the 22 by 17, which equals 5).
We then know that something divided by 3 equals 5, so we can represent this as x / 3 = 5. Solving the equation algebraically, we find that x = 15 (this is done by isolating x on one side of the equation, so by multiplying the 5 by 3, which equals 15).
We then know that something subtracted by 13 equals 15, so we can represent this as x - 13 = 15. Solving the equation algebraically, we find that x = 28 (this is done by isolating x on one side of the equation, so by adding the 13 to the 15, which equals 28).
Finally, we know that something multiplied by 4 equals 28, so we can represent this as x times 4 = 28. Solving the equation algebraically, we find that x = 7 (this is done by isolating x on one side of the equation, so by dividing the 28 by 4, which equals 7), so 7 is your answer.
