FOREST BIOMETRICS EXAM 1
QUESTIONS & ANSWERS(RATED A+)
This course will concentrate on two areas: - ANSWERSampling and Estimation
Growth and Yield
Sampling is - ANSWERa method or process that allows an estimation to be
generated to describe a population
why dont we measure all the trees in an area? - ANSWERMeasuring an entire
population is time consuming and in most cases cost prohibitive
Sampling, if done correctly, can provide a - ANSWERcost effective and accurate
method for effective decision making for natural resource managers
there is a direct correlation between costs and - ANSWERinformation quality
To determine the quality of sampling and estimation we will use - ANSWERstatistics
for validation
For a forester, the sampling and estimation process is called - ANSWERforest
inventory
2 most common reasons to do a forest inventory - ANSWERgather info for
-management
-timber sales
The intensity of a forest inventory results in an estimation of the - ANSWER-whats
out there
-how much is out there
-where is it
the higher the intensity of an inventory, the greater the - ANSWERaccuracy
Inventory Objectives can include - ANSWERVolume or value or both of timber in a
defined spatial extent
Number of deer per spatial unit
Habitat quality for a wildlife species
Occurrences of other species (vegetative or animal)
Fuel Load Modeling
Road characteristics and integrity
Soil analysis
Two types of Sampling: - ANSWERSubjective and Probability
probabilty sampling - ANSWERcovers sampling techniques needed to serve multiple
decisions for the long term and where statistical validation is needed
, what is the preferred sampling method? - ANSWERprobability
Two levels of numerical results: - ANSWERcomputation and final reported values
main difference between computation and final reported values: - ANSWERnumber
of decimal places. Computation has many decimal places, final has rounded number
of decimal places
subjective sampling - ANSWERcan be implemented with or without preconceived
bias
what does biased sampling mean - ANSWERconscious avoidance of forest stand
nonconformities i.e. only pick plots that seem to represent the entire stand that can
leave out nonaverage characteristics
what does non-biased sampling mean - ANSWERinclusion of forest conditions that
include areas considered extremes (min/max) of the population i.e. small/large DBH
Subjective sampling Can be justified when: - ANSWER• Extreme high cost of
sampling and large variations between sample variables i.e. inaccessible spatial
extents with large ranges for DBH and # Trees
• Estimations are time sensitive and decisions are not related to bias estimates
• Low funding to complete inventory
• Precision estimates are not needed
• Results are not going to be contested
Size and shape of sampling field plots are determined based on - ANSWERcustoms,
traditions and experience.
Fixed plots are best for measuring - ANSWERchange
what do you use to help determine appropriate plot size for an area - ANSWERsize
of area, density of trees, types of trees
Inventories are collected and results used for varied - ANSWERtemporal decision
making i.e. current or future or both
in order to estimate what an inventoried forest will look like in several years, you
make - ANSWERmodels
definition of measurements - ANSWERthe act or process of measuring a figure,
extent, or amount obtained by measuring.
definition of measure - ANSWERthe dimension, capacity or amount of something
ascertained by measuring: a measured quantity
Forest mensuration is defined as - ANSWERthe art and science of providing the
quantitative information about trees and forest stands necessary for forest
management, planning and research.
QUESTIONS & ANSWERS(RATED A+)
This course will concentrate on two areas: - ANSWERSampling and Estimation
Growth and Yield
Sampling is - ANSWERa method or process that allows an estimation to be
generated to describe a population
why dont we measure all the trees in an area? - ANSWERMeasuring an entire
population is time consuming and in most cases cost prohibitive
Sampling, if done correctly, can provide a - ANSWERcost effective and accurate
method for effective decision making for natural resource managers
there is a direct correlation between costs and - ANSWERinformation quality
To determine the quality of sampling and estimation we will use - ANSWERstatistics
for validation
For a forester, the sampling and estimation process is called - ANSWERforest
inventory
2 most common reasons to do a forest inventory - ANSWERgather info for
-management
-timber sales
The intensity of a forest inventory results in an estimation of the - ANSWER-whats
out there
-how much is out there
-where is it
the higher the intensity of an inventory, the greater the - ANSWERaccuracy
Inventory Objectives can include - ANSWERVolume or value or both of timber in a
defined spatial extent
Number of deer per spatial unit
Habitat quality for a wildlife species
Occurrences of other species (vegetative or animal)
Fuel Load Modeling
Road characteristics and integrity
Soil analysis
Two types of Sampling: - ANSWERSubjective and Probability
probabilty sampling - ANSWERcovers sampling techniques needed to serve multiple
decisions for the long term and where statistical validation is needed
, what is the preferred sampling method? - ANSWERprobability
Two levels of numerical results: - ANSWERcomputation and final reported values
main difference between computation and final reported values: - ANSWERnumber
of decimal places. Computation has many decimal places, final has rounded number
of decimal places
subjective sampling - ANSWERcan be implemented with or without preconceived
bias
what does biased sampling mean - ANSWERconscious avoidance of forest stand
nonconformities i.e. only pick plots that seem to represent the entire stand that can
leave out nonaverage characteristics
what does non-biased sampling mean - ANSWERinclusion of forest conditions that
include areas considered extremes (min/max) of the population i.e. small/large DBH
Subjective sampling Can be justified when: - ANSWER• Extreme high cost of
sampling and large variations between sample variables i.e. inaccessible spatial
extents with large ranges for DBH and # Trees
• Estimations are time sensitive and decisions are not related to bias estimates
• Low funding to complete inventory
• Precision estimates are not needed
• Results are not going to be contested
Size and shape of sampling field plots are determined based on - ANSWERcustoms,
traditions and experience.
Fixed plots are best for measuring - ANSWERchange
what do you use to help determine appropriate plot size for an area - ANSWERsize
of area, density of trees, types of trees
Inventories are collected and results used for varied - ANSWERtemporal decision
making i.e. current or future or both
in order to estimate what an inventoried forest will look like in several years, you
make - ANSWERmodels
definition of measurements - ANSWERthe act or process of measuring a figure,
extent, or amount obtained by measuring.
definition of measure - ANSWERthe dimension, capacity or amount of something
ascertained by measuring: a measured quantity
Forest mensuration is defined as - ANSWERthe art and science of providing the
quantitative information about trees and forest stands necessary for forest
management, planning and research.
