central tendency

Question 1

central tendency

Answer 1

One number that tries to describe the

entire set of numbers.

Question 2

mean

Answer 2

Average. Sum of all the numbers
divided by the total number of values.

Question 3

median

Answer 3

The middle number.

Question 4

mode

Answer 4

Most common number in a the set.

Question 5

normal distribution

Answer 5

Graph where data is clustered in the
middle and then decreases on either

side evenly.

Question 6

bell curve

Answer 6

Normal distribution.

Question 7

standard deviation

Answer 7

Describes how much variability there is in

the normal distribution.

Question 8

statistics

Answer 8

Collecting and analyzing data looking
for common characteristics.

Question 9

A statistic

Answer 9

is a characteristic or measure obtained by using the data values from a
sample.

Question 10

parameter

Answer 10

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

Question 11

mean

Answer 11

is the sum of the values, divided by the total number of values.

Question 12

sample mean,

Answer 12

denoted by (pronounced “X bar”), is calculated by using
sample data. The sample mean is a statistic.

Question 13

population mean

Answer 13

denoted by (pronounced “mew”), is calculated by using all
the values in the population. The population mean is a parameter.

Question 14

median

Answer 14

is the midpoint of the data array. The symbol for the median is MD.

Question 15

mode.

Answer 15

The value that occurs most often in a data set

Question 16

midrange

Answer 16

midrange is defined as the sum of the lowest and highest values in the data set,
divided by 2. The symbol MR is used for the midrange.

Question 17

weighted mean

Answer 17

of a variable X by multiplying each value by its correspon-
ding weight and dividing the sum of the products by the sum of the weights.