Module 16 Vocab

Question 1

arrangement of the data in ascending or descending order

Answer 1

array

Question 2

The _____ is commonly referred to as an average.

Answer 2

mean

Question 3

The ____ is the positional average; it’s the number in the middle. To find the ____, it is first necessary to arrange the data in ascending or descending order and then count in an equal number from each end.

Answer 3

median

Position of the median = n + 1 / 2

Note:
n = number of variates in the data set

Ex: if 5 numbers in a data set, then 5 + 1 / 2 3. The median will be the third number in from either end once the data are arrayed.
Ex 2: When given the array: [2, 3, 4, 5] the median is 3.5
(The median is still the number that lies midway between the 2nd and 3rd numbers but it is now the number that is halfway between 3 and 4, which is 3.5).

Question 4

_____ is the most frequently occurring number in a distribution

Answer 4

mode

Ex: What’s the mode in the following data set?
2, 3, 4, 5, 5, 6
Answer : 5

Question 5

the complete set of all the items in a specific category.

Answer 5

population (aka universe)

Question 6

The simplest measure of dispersion. This is the difference between the highest and lowest value in the data set.

Answer 6

range

Ex: 2, 3, 3, 4, 5, 5
The range is 3 which is the difference between 5 and 2.

Question 7

in statistics, a characteristic or attribute of an item, service, or individual that can change from observation to observation.

Answer 7

variable

Question 8

the linear distance around an area or structure and is the sum of all the sides.

Answer 8

perimeter

Question 9

In the case of a circle, the perimeter is referred to as the _____.

Answer 9

circumference

Question 10

Area of a rectangle formula

Answer 10

Rectangle Area = length x width

Question 11

Area of a triangle formula

Answer 11

Triangle Area = 1/2 (base * height)
OR
Area = (Base * Height) / 2

Question 12

Area of a trapezoid formula

Answer 12

Trapezoid Area = 1/2 (sum of the bases) * Height

Question 13

Circumference formula

Answer 13

c = 3.14*d

```
3.14…. = pi
(d = diameter of the circle)
~~~

Question 14

1 acre = ___ SF?

Answer 14

43,560 SF

Question 15

in statistics, a subset of a population selected for analysis

Answer 15

sample

Question 16

The mean, median, and mode are measures of ____ and tell us where numbers tend to cluster.

Answer 16

central tendency

Ex: mean, median, mode

Question 17

We can examine measures of ______, which quantify the extent to which data vary from the average

Answer 17

dispersion

Ex: range, standard deviation

Question 18

the measure of the variance in the data away from the mean. the smaller the ____, the better

Answer 18

standard deviation