Measures of central tendency are called such because

a.
they all find a different "center" of a data set.
b.
they all find approximately the same "center" of a data set.
c.
they are all different ways to find the exact same "center" of a data set.
d.
they all find a different type of "center" of a data set, which may or may not be the same value.

The answer is letter D. Measures of central tendency are called such because  they all find a different type of "center" of a data set, which may or may not be the same value. 

Measures of central tendency involve either the Mean, Median or Mode. These three may or may not capture the same values.

For example, if the data set were to be this one:
2, 2, 2, 3, 3, 4, 4, 4
The is Mean = 3, Median = 3 and the Mode = 4.
The results tend to vary but they are all aimed to gather different measures of the "center" of a dataset.

Answer with explanation:

The three Measures of central tendency are

1. Mean

2. Median

3. Mode

→If the data set is Symmetrical, then at the center

Mean =Median =Mode

And, mean is best suited to evaluate for this kind of  Data set to calculate center.

→If the data set is skewed, Median is best way to calculate center.

→For, categorical data set, like, shoe size worn in a country, Mode is perfect way  to read this kind of data set.

So,from above three statement we can conclude that, the three that is , Mean , Median, and Mode may vary or same for a Data set.

Option D, looks most Appropriate.

  They all find a different type of "center" of a data set, which may or may not be the same value.

Rasheed bought 9 packages of chocolate bars

Step-by-step explanation:

Rasheed bought two kinds of candy bars, chocolate and toffee, that came in packages of 2 bars each.

Let 'cb' represent the number of chocolate bars that Rasheed bought

Let 'tb' represent the number of toffee bars that Rasheed bought

If Rasheed bought 1 fewer package of chocolate bars than toffee bars; we have the following suitable expression

cb = tb - 1

Also; he handed out of the cb and of tb; we have:

If we make tb the subject of the formula since we are only looking for the number of chocolate bars Rasheed bought; we have:

From the previous expression cb = tb - 1

1 = tb - cb

Replacing in the above equation; we have:

cb = 9

Hence,Rasheed bought 9 packages of chocolate bars