A researcher wishes to design a fully blocked experiment with groups of subjects representing every possible combination of 1 explanatory variable (control vs. treatment) and 3 other variables (male vs. female, old vs. young, healthy vs. ill) for a total of 4 variables.
16
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The sample space depends on what the trial or experiment is.
The answer will depend on the size of the blocks.
There are 10 blocks in a square meter
there a 12.5
You would have to walk 10 blocks south and then 5 blocks west or something like that for example 3 blocks west then 5 blocks south then 2 blocks west then 5 blocks south again but it all adds up to be a total of 15 blocks.