A hypothesis test was made of H0: μ1 = μ2 versus H1: μ1 not equal to μ2 . Independent random samples were drawn from approximately normal populations. The sample means were top enclose X subscript 1 end enclose space equals 73 and top enclose X subscript 2 end enclose space equals 71 . The population standard deviations were σ1 = 4 and σ2 = 3. The sample sizes were n1 = 24 and n2 = 18, then the value of the test statistic Z is given by:
Added by Wed K.
Step 1
To do this, we need to calculate the test statistic, Z. Z is given by: Z = (x1 - x2) / (σ1 + σ2) In this equation, x1 and x2 are the sample means and σ1 and σ2 are the population standard deviations. Show more…
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