TABLE 11-4 An Agronomist Wants to Compare the Crop Yield of 3

question 130

Short Answer

TABLE 11-4
An agronomist wants to compare the crop yield of 3 varieties of chickpea seeds. She plants 15 fields, 5 with each variety. She then measures the crop yield in bushels per acre. Treating this as a completely randomized design, the results are presented in the table that follows.
Trial Smith Walsh Trevor
1 11.1 19.0 14.6
2 13.5 18.0 15.7
3 15.3 19.8 16.8
4 14.6 19.6 16.7
5 9.8 16.6 15.2
-Referring to Table 11-4, the within-group variation or SSW is ________.

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Definitions:

Preliminary Sample

An initial sample drawn from a population, often used to test procedures or make preliminary estimates before a larger study.

Interval Estimate

An estimate of a population parameter that provides a range of values within which the parameter is expected to lie, often associated with a specific confidence level.

Estimated σ

Approximation of the standard deviation (σ), a measure of the dispersion or variation of a distribution.

Normal Probability Distribution

A bell-shaped probability distribution, also known as Gaussian distribution, that is fully defined by its mean and standard deviation.