Flashcards in Lab Exam 1 Deck (80)

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## statistical population

### the entire set of data of interest (i.e., the weights of all of the mice)

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## the entire set of data of interest (i.e., the weights of all of the mice)

### statistical population

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## statistical sample

### the measured portion, or subset, of the population

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## the measured portion, or subset, of the population

### statistical sample

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## biological population

### the aggregation of individual organisms of a single species inhabiting a given area

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## the aggregation of individual organisms of a single species inhabiting a given area

### biological population

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## entire set of data about which one wishes to draw conclusions

### statistical population

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## an entire set of measurements from a habitat, a community, a biological population, or a portion of a biological population

### statistical population

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## a portion of a larger set of data

### statistical sample

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## physical sample

### a portion, or subset, of a collection of one or more material objects, either biotic or abiotic

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## a portion, or subset, of a collection of one or more material objects, either biotic or abiotic

### physical sample

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## an example of a physical sample

### taking 1 - liter sample of pond water

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## refers to a collection of data such as measurements of the temperature or phosphate content of pond water

### statistical sample

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## when are sampling procedures biased

### some members of the population are more likely to be recorded than others, or if the recording of some affects the recording of others

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## a single value could have an uncomfortably high probability of being far from the typical or average value. Therefore...

### a series of replicated measures should be taken

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## species-sample curve

### cumulative number of species is plotted against the cumulative number of physical samples, where each sample might be a plot

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### species-sample curve

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## species-area curve

### cumulative number of species is plotted against the cumulative size of the area sampled

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## cumulative number of species is plotted against the cumulative size of the area sampled

### species-area curve

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## performance curve

### examines the mean value of a set of measurements for an ecological variable

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## examines the mean value of a set of measurements for an ecological variable

### performance curve

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## example of performance curve

### the mean density or biomass for a given species plotted as a function of the cumulative number of samples or cumulative area sampled

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## plots a cumulative mean of some variable instead of the cumulative number of species

### performance curve

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## subsamples

### portions of samples taken in the field later examined in the lab

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## must be randomly taken from the sample (shaking, mixing, or blending sample) to reflect characteristics of entire sample

### subsample

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## experimental design

### the planning of field/lab studies

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## details with the questions to be asked in a study, the selection of variabls to be studied, and the choice of a sampling program.

### experimental design

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## most commonly used experimental design

### two-sample comparison

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## two-sample comparison

### one selects two situations in which all conditions but one are equal (or nearly equal)

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