Do these data indicate a significant difference between the treatments at the .05 level of significance?Calculate the test by hand.

A researcher tests if the introduction of fluoride to the drinking water will significantly reduce the average number of cavities among children. Last year the average number of cavities was μ = 2.32, with σ = 0.46. This year fluoride was introduced. Thirty six children are sampled, and have an average of 2.07 cavities. Using […]

Determine what test to conduct for study a and for study b. Decide whether there is a significant difference between means.

PSYC 381: Assignment #3 1. A researcher tests if the introduction of fluoride to the drinking water will significantly reduce the average number of cavities among children. Last year the average number of cavities was μ = 2.32, with σ = 0.46. This year fluoride was introduced. Thirty six children are sampled, and have an […]

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