S&P Q4-1st Quiz

It is a proposed explanation, assertion, or assumption about a population parameter or about the distribution of a random variable.

• Decision

• Probability

• Statistics

• Hypothesis

It is also the probability of committing an incorrect decision about the null hypothesis.

• Level of error

• Level of acceptance

• Level of hypothesis

• Level of significance

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

• 𝐻𝑎 = 100

• 𝐻𝑎 > 100

• 𝐻𝑎 ≠ 100

• 𝐻𝑎 < 100

In a right-tailed test, in which critical value listed below will the computed z of 2.313 fall in the non-rejection region?

• 1.383

• 2.228

• 1.533

• 2.365

1.      Which of the following would be an appropriate null hypothesis?

• The mean of a sample is equal to 75.

• The mean of a population is equal to 75.

• The mean of a sample is not equal to 75.

• The mean of a population is greater than 75

Which of the following describes an alternative hypothesis in a left-tailed test?

• 𝐻𝑎 > 100

• 𝐻𝑎 < 100

• 𝐻𝑎 = 100

• 𝐻𝑎 ≠ 100

Which of the following would be an appropriate alternative hypothesis for one-tailed test?

• 𝐻𝑎 < 100

• 𝐻𝑎 = 100

• 𝐻𝑎 ≥ 100

• 𝐻𝑎 ≤ 10

Using a left-tailed test, which of the following value of z falls in the rejection region where the critical value is – 1.725?

• – 1.700

• – 1.715

• – 1.724

• – 1.728

   If the computed z-value is 2.015 and the critical value is 1.833, which of the following statements could be true in a right-tailed test?

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

• It lies in the rejection region, we failed to reject 𝐻𝑜.

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

• It lies in the non-rejection region, we failed to reject 𝐻𝑜.

If the computed z-value is – 1.290 and the critical value is – 2.571, which of the following statements could be true in a left-tailed test?

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

• It lies in the rejection region, we failed to reject 𝐻𝑜.

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

• It lies in the non-rejection region, we failed to reject 𝐻𝑜