Ch 1

Question 1

measurement scale (4)

Answer 1

categorical, ordinal, interval, and ratio

Question 2

categorical

Answer 2

words (passed/not passed)

Question 3

number of siblings a person has is a _____ metric

Answer 3

discrete

Question 4

ordinal

Answer 4

ranking (1= highest, 2= next highest)

Question 5

At the start of the college basketball season, sports illustrated publishes its rankings for NCAA College Basketball. This ranking is

Answer 5

Univariate, cross-sectional, ordinal

Question 6

the act of obtaining data is

Answer 6

a measurement

Question 7

interval

Answer 7

like ranking, but the distance between has significance

Question 8

ratio

Answer 8

has a natural zero

Question 9

population

Answer 9

all items of interest for a particular decision or investigation

Question 10

sample

Answer 10

a subset of a population

Question 11

samples are used…

Answer 11

to reduce costs of data collection and when a full census cannot be taken

Question 12

measures of central tendency

Answer 12

mean
median
mode
proportion

Question 13

measures of dispersion

Answer 13

range
variance
standard deviation

Question 14

quantitative measures

Answer 14

central tendency
dispersion
frequency distributions and histograms

Question 15

frequency distribution

Answer 15

a table that shows the number of observations in each of several non overlapping groups

Question 16

relative frequency distribution

Answer 16

expressing the frequencies as a fraction or proportion of the total

Question 17

cumulative relative frequency

Answer 17

summing all of the relative frequencies at or below each upper limit

Question 18

histogram

Answer 18

graphical display of data grouped into ranges and plotted as bars

Question 19

boxplot

Answer 19

displays five key stats (min, q1, median, q3, and max)

Question 20

dot scale diagram

Answer 20

displays histogram data as well as mean, median, q1 & q3, and +-1, 2, and 3 standard deviation ranges from the mean

Question 21

mean

Answer 21

average

Question 22

standard error

Answer 22

measures the accuracy with which a sample represents a population

Question 23

median

Answer 23

middle

Question 24

mode

Answer 24

most occurring

Question 25

standard deviation

Answer 25

measure of how spread numbers are

Question 26

sample variance

Answer 26

average of the squared differences from the mean

Question 27

kurtosis

Answer 27

the peakedness or flatness of a histogram

Question 28

skewness

Answer 28

measures the degree of asymmetry of observations around the mean

Question 29

range

Answer 29

from ___ to ___