A hypothesis test was made of H0: µ1 = µ2 versus H1: µ1 ≠ µ2. Independent random samples were drawn from approximately normal populations. The sample means were $X_1 = 73$ and $X_2 = 71$. The population standard deviations were $\sigma_1 = 4$ and $\sigma_2 = 3$. The sample sizes were $n_1 = 24$ and $n_2 = 18$, then the value of the test statistic Z is given by: 2.37 4.9 3.68 1.85
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$\mu_1$ and $\mu_2$ are the population means. $\sigma_1$ and $\sigma_2$ are the population standard deviations. $n_1$ and $n_2$ are the sample sizes. Show more…
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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:
Lucas F.
Independent random samples from two normal populations with a common variance are summarized below. Using an alpha level of significance of 0.05, test the following hypotheses: H0: μ1 = μ2 HA: μ1 > μ2 Sample 1: n1 = 15, x̄1 = 70, s1 = 14 Sample 2: n2 = 18, x̄2 = 62, s2 = 18 What is the observed test-statistic? Note: Round your answer to two decimal places (4.56, 2.67).
Adi S.
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