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Measures of Central Tendency Vocab

Total questions: 25

Worksheet time: 6hrs 15mins

Name
Class
Date
1.

(a)   is a chracteristic or measure obtained by using data values from a sample?

2.

A _________ is a characteristic or measure obtained by using all the data values from a specific population.

a)

statistic

b)

parameter

c)

data

d)

Frequency

3.

The sum of all values is indicated by what Greek letter?

a)

Χ

b)

Σ

c)

Xm

d)

μ

4.

 ΣXn \frac{\Sigma X}{n}\   represents which of the following? 

a)

Sample mean

b)

Population mean

c)

Grouped Data mean

d)

 μ\mu  

5.

When dealing with measures of central tendency - μ - symbol represents what?

a)

Sample

b)

Population

c)

Sample Mean

d)

Population Mean

e)

Grouped Data Mean

6.

Xm represents which of the following?

a)

Sample Mean

b)

Population Mean

c)

The summation of the values

d)

Frequency

e)

Midpoint

7.

 Σf⋅Xmn\frac{\Sigma f\cdot X_m}{n}       This formula is used to calculate which of the following?

a)

Sample Mean

b)

Population Mean

c)

Grouped Data Mean

d)

Midrange

8.

 ΣXN\frac{\Sigma X}{N}      is used to calculate what measure of central tendency? 

(a)  

9.

What is the symbol or abbreviation for median?

(a)  

10.

What is the symbol or abbreviation for midrange?

(a)  

11.

The measure of central tendency which is the value that appears the most often in the data set is called what?

(a)  

12.

If the data set has only one value that occurs with the greatest frequency it is said to be:

a)

modal

b)

unimodal

c)

bimodal

d)

multimodal

e)

no mode

13.

if the data set has more than two values that occur with the same greatest frequency, each value is used as the mode, and the data set is said to be _______ ?

a)

modal

b)

modal class

c)

bimodal

d)

multimodal

e)

unimodal

14.

Find both the modal class and then the mode for the data given? 

a)

36.0-38.9

b)

37.45

c)

36.0-38.9 and 37.45

d)

42.0-44.9 and 43.45

15.

What is the n value for the grouped data set in the picture?

a)

44.9

b)

14

c)

2

d)

30

16.

What is the mean for the grouped data provided in the chart?

a)

6.1

b)

36

c)

40

d)

30

17.

If you are given ΣX = 132.4 and n = 7, which of the following is the properly rounded sample mean?

a)

18.9

b)

18.91

c)

19

d)

19.0

18.

Which of the following is defined as the sum of the lowest and highest values in the data set, divided by two.

a)

Midpoint

b)

Midrange

c)

Mode

d)

Median

e)

Mean

19.

Which of the following is found by arranging the data from smallest to largest and then finding the middle point or middle number of the data?

a)

Midpoint

b)

Midrange

c)

Mode

d)

Median

e)

Mean

20.

Which of the following is used to calculate a mean when not all values are of equal value?

a)

Sample Mean

b)

Population Mean

c)

Grouped Data Mean

d)

Weighted Mean

21.

Which of the following is NOT affected by extremely high or low values?

a)

Mean

b)

Median

c)

Midrange

22.

What are extremely low or extremely high values in a data set called?

a)

unfortunate

b)

outcasts

c)

outliers

d)

random

23.

When the majority of the data values fall to the left of the mean and are clustered at the lower end of the distribution, it is said to be __________________ skewed.

a)

right or positively

b)

left or negatively

c)

normal or symmetricly

d)

not skewed

24.

The graph in the picture would be considered which type of distribution?

a)

Positively or Right Skewed

b)

Negatively or Left Skewed

c)

Normal or Symmetric

d)

None of the abve

25.

 ΣwXΣw\frac{\Sigma wX}{\Sigma w}  This formula is used to find which of the following? 

a)

Sample Mean

b)

Population Mean

c)

Grouped Mean

d)

Weighted Mean