Hypothesis Testing

It is also referred to as a probability of committing an incorrect decision about the null hypothesis.

• Level of Error

• Level of Hypothesis

• Level of Acceptance

• Level of Significance

Which of the following describes a null hypothesis using two-tailed test?

• 𝐻o:𝜇=𝜇o

• 𝐻o:𝜇≠𝜇o

• 𝐻o:𝜇≥𝜇o

• 𝐻o:𝜇≤𝜇o

Which of the following describes an alternative hypothesis using two- tailed test?

• 𝐻𝑎:𝜇<50𝑦𝑒𝑎𝑟𝑠𝑜𝑙𝑑

• 𝐻𝑎:𝜇>50𝑦𝑒𝑎𝑟𝑠𝑜𝑙𝑑

• 𝐻𝑎: 𝜇 ≠ 50 𝑦𝑒𝑎𝑟𝑠 𝑜𝑙𝑑

• 𝐻𝑎 : 𝜇 = 50 𝑦𝑒𝑎𝑟𝑠 𝑜𝑙𝑑

Which of the following must be used as the significance level if we want a lower possibility of correct decision?

• 1%

• 2%

• 5%

• 10%

In a one-tailed test, in which critical values below will the computed z of 2.312 falls in the non-rejection region?

• 1.383

• 1.533

• 2.228

• 2.354

When is a Type II error committed?

• We reject a null hypothesis that is true.

• We reject a null hypothesis that is false.

• We fail to reject a null hypothesis that is true.

• We fail to reject a null hypothesis that is false.

Using a left-tailed test, which of the following value of z will not fall in the rejection region where the critical value is – 1.638?

• –1.637

• –1.639

• –1.641

• –1.706

If the computed z-value is 1.915 and the critical value is 1.812, which of the following statements could be true?

• It lies in the rejection region, 𝐻𝑜 must be rejected.

• It lies in the rejection region, hence we fail to reject𝐻𝑜.

• It lies in the non-rejection region, 𝐻𝑜 must be rejected.

• It lies in the non-rejection region, hence we fail to reject𝐻𝑜.

___________is a statistical method that is used in making decisions using experimental data.

• Hypothesis Testing

• Hypothesis

• Null Hypothesis

• Alpha

The alternative hypothesis is contrary to the _________.

• Two tailed test

• Type I error

• Null hypothesis

• Alpha