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sh the exam.
Checking the lengths (cm) of randomly selected products from
two manufacturing plants, we get the following data:
n₁ = 26,₁ = 6.9, s₁ = 1.26,
n₂ = 23,x2 = 7.2, S₂ = 1.76.
Use α = 0.05 and assume equal variances, what is the pooled
standard deviation?
