3. Which of the following describes an alternative hypothesis using two-tailed test?                               *A. 𝐻𝑎: 𝜇 < 50 𝑦𝑒𝑎𝑟𝑠 𝑜𝑙𝑑B. 𝐻𝑎: 𝜇 ≠ 50 𝑦𝑒𝑎𝑟𝑠 𝑜𝑙𝑑C. 𝐻𝑎: 𝜇 > 50 𝑦𝑒𝑎𝑟𝑠 𝑜𝑙𝑑D. 𝐻𝑎: 𝜇 = 50 𝑦𝑒𝑎𝑟𝑠 𝑜𝑙d

3. Suppose we want to test the null hypothesis H0:p=0.20𝐻0:𝑝=0.20 against the alternative hypothesis Ha:p<0.20𝐻𝑎:𝑝<0.20 . Suppose also that we observed 25 successes in a random sample of 100 subjects and the level of significance is 0.05. What is the observed test statistic for this test?Multiple choice 1 Question 3  z=1.15𝑧=1.15   z=−1.25𝑧=−1.25   z=−1.15𝑧=−1.15   z=1.25

35.In one tail test for the population mean if the null hypothesis is not rejected when the alternative hypothesis is true then which of the following happens?  A. Type 2 error  B. Type 1 error  C. No error  D. Two tailed test should've been used

A two-sided alternative hypothesis is also known as a _________________.*1 pointDirectional testNon-directional testParametric testOne-tailed test

The statement of the alternative hypothesis Ha: μ1 - μ2 < 0, states:Question 5Select one:a.that population mean 1 is smaller than population mean 2.b.that population mean 2 is smaller than population mean 1.c.that population mean 1 is larger than population mean 2.d.that the two population means are the same.

What is the primary difference between a one-tailed and a two-tailed test?  A. The level of significance  B. The number of hypotheses tested  C. The directionality of the hypothesis  D. The sample size