BIOL 300 MIDTERM EXAM QUESTIONS
WITH COMPLETE SOLUTIONS
Variable - Correct Answers -a characteristic measured on individuals drawn from a
population under study
Data - Correct Answers -measurements of one or more variables made on a collection
of individuals
random sample - Correct Answers --each individual has equal probability of being
selected
-independent selection of individuals
sampling error - Correct Answers -the chance difference between an estimate and the
population parameter being estimated
Bias - Correct Answers -systematic discrepancy (tending in a certain direction) between
an estimate and the true population characteristic
Error - Correct Answers -random difference (not tending in any direction) between an
estimate and the true population characteristic
Population parameters are ____ whereas sample estimates are ______ changing from
one random sample to the next from the same population - Correct Answers -constants,
random variables
What are the two types of categorical variables? - Correct Answers --ordinal (variables
have an inherent order to them)
-nominal (no inherent order)
What are the two types of numerical variables? - Correct Answers --continuous
-discrete
What type of graph to use for:
-single variable (categorical)
-frequency distribution - Correct Answers --Bar graph
-frequency table
, What type of graph to use for:
-single variable (numerical)
-frequency distribution - Correct Answers --histogram
-cumulative frequency distribution
-frequency table
What type of graph to use for:
-categorical response variable
-categorical explanatory variable - Correct Answers --contingency table
-grouped bar graph
-mosaic plot
What type of graph to use for:
-categorical response variable
-numerical explanatory variable - Correct Answers --multiple histograms
-strip chart
-box plot
-cumulative frequency distributions
What type of graph to use for:
-numerical response variable
-categorical explanatory variable - Correct Answers --multiple histograms
-cumulative frequency distributions
What type of graph to use for:
-numerical response variable
-numerical explanatory variable - Correct Answers --scatter plot
-line graph
What is this formula? - Correct Answers -Mean of a population
What is this formula? - Correct Answers -Mean of a sample
What are the three measures of location? - Correct Answers --mean
-median
-mode
What are the four measures of width - Correct Answers --range
-variance
-standard deviation
-coefficient of variation
What is this a formula for? - Correct Answers -Variance
what is this formula? - Correct Answers -standard deviation
WITH COMPLETE SOLUTIONS
Variable - Correct Answers -a characteristic measured on individuals drawn from a
population under study
Data - Correct Answers -measurements of one or more variables made on a collection
of individuals
random sample - Correct Answers --each individual has equal probability of being
selected
-independent selection of individuals
sampling error - Correct Answers -the chance difference between an estimate and the
population parameter being estimated
Bias - Correct Answers -systematic discrepancy (tending in a certain direction) between
an estimate and the true population characteristic
Error - Correct Answers -random difference (not tending in any direction) between an
estimate and the true population characteristic
Population parameters are ____ whereas sample estimates are ______ changing from
one random sample to the next from the same population - Correct Answers -constants,
random variables
What are the two types of categorical variables? - Correct Answers --ordinal (variables
have an inherent order to them)
-nominal (no inherent order)
What are the two types of numerical variables? - Correct Answers --continuous
-discrete
What type of graph to use for:
-single variable (categorical)
-frequency distribution - Correct Answers --Bar graph
-frequency table
, What type of graph to use for:
-single variable (numerical)
-frequency distribution - Correct Answers --histogram
-cumulative frequency distribution
-frequency table
What type of graph to use for:
-categorical response variable
-categorical explanatory variable - Correct Answers --contingency table
-grouped bar graph
-mosaic plot
What type of graph to use for:
-categorical response variable
-numerical explanatory variable - Correct Answers --multiple histograms
-strip chart
-box plot
-cumulative frequency distributions
What type of graph to use for:
-numerical response variable
-categorical explanatory variable - Correct Answers --multiple histograms
-cumulative frequency distributions
What type of graph to use for:
-numerical response variable
-numerical explanatory variable - Correct Answers --scatter plot
-line graph
What is this formula? - Correct Answers -Mean of a population
What is this formula? - Correct Answers -Mean of a sample
What are the three measures of location? - Correct Answers --mean
-median
-mode
What are the four measures of width - Correct Answers --range
-variance
-standard deviation
-coefficient of variation
What is this a formula for? - Correct Answers -Variance
what is this formula? - Correct Answers -standard deviation
