MTH~128 Chapter 1 Exam Questions With
Complete Answers
average - ANSWER also called mean
a number that describes the central tendency of the data
Blinding - ANSWER a technique where the subjects do not know whether they are receiving a
treatment or a placebo
categorical variable - ANSWER variables that take on values that are names or lables
cluster sampling - ANSWER a method for selecting a random sample and dividing the
population into groups (clusters)
use simple random sampling to select a set of clusters
every individual in the chosen clusters is included in the sample
continuous random variable - ANSWER a random variable (RV) whose outcomes are
measures; the height of trees in the forest is a continuous RV
Control Group - ANSWER a group in a randomized experiment that receives an inactive
treatment but is otherwise managed exactly as the other groups
, convenience sampling - ANSWER a nonrandom method of selecting a sample
this method selects individuals that are easily accessible and may result in biased data
cumulative relative frequency - ANSWER applies to an ordered set of observations from the
smallest to largest. The cumulative relative frequency is the sum of the relative frequencies for
all values that less than or equal to the given value
Data - ANSWER Facts, figures, and other evidence gathered through observations.
Qualitative - ANSWER an attribute whose value is indicated by a label
Quantitative - ANSWER an attribute whose value is indicated by a number
discrete - ANSWER subgroup of quantitative data
Data is discrete if it is the result of counting
continous - ANSWER subgroup of quantitative data
data is continuous if it is the result of measuring
Discrete Random Variable - ANSWER a random variable (RV) whose outcomes are counted
Complete Answers
average - ANSWER also called mean
a number that describes the central tendency of the data
Blinding - ANSWER a technique where the subjects do not know whether they are receiving a
treatment or a placebo
categorical variable - ANSWER variables that take on values that are names or lables
cluster sampling - ANSWER a method for selecting a random sample and dividing the
population into groups (clusters)
use simple random sampling to select a set of clusters
every individual in the chosen clusters is included in the sample
continuous random variable - ANSWER a random variable (RV) whose outcomes are
measures; the height of trees in the forest is a continuous RV
Control Group - ANSWER a group in a randomized experiment that receives an inactive
treatment but is otherwise managed exactly as the other groups
, convenience sampling - ANSWER a nonrandom method of selecting a sample
this method selects individuals that are easily accessible and may result in biased data
cumulative relative frequency - ANSWER applies to an ordered set of observations from the
smallest to largest. The cumulative relative frequency is the sum of the relative frequencies for
all values that less than or equal to the given value
Data - ANSWER Facts, figures, and other evidence gathered through observations.
Qualitative - ANSWER an attribute whose value is indicated by a label
Quantitative - ANSWER an attribute whose value is indicated by a number
discrete - ANSWER subgroup of quantitative data
Data is discrete if it is the result of counting
continous - ANSWER subgroup of quantitative data
data is continuous if it is the result of measuring
Discrete Random Variable - ANSWER a random variable (RV) whose outcomes are counted
