Drawing Conclusion About Population Mean

What is the critical value in a two-tailed test with 10% level of significance and a degree of freedom of 18?

• 2.575

• 2.326

• 1.960

• 1.734

Tags

CCSS.HSS.ID.A.4

In a right-tailed test, the computed value is greater than the critical value, then we

• retain the null hypothesis

• reject the null hypothesis

• support the null hypothesis

• fail to reject the null hypothesis

What does it mean when the null hypothesis is rejected?

• The null hypothesis is incorrect.

• The alternative hypothesis is correct.

• There is a sufficient evidence to support the null hypothesis.

• There is an insufficient evidence to disprove the null hypothesis.

Tags

CCSS.6.SP.A.2

In a left-tailed test if the t-computed value is -2.115 and the critical value is -2.423, what will be the decision?

• Reject the null hypothesis

• Do not reject the null hypothesis.

• Reject both the null and alternative hypotheses.

• Support both the null and alternative hypotheses.

Tags

CCSS.HSS.ID.A.4

When we fail to reject the null hypothesis, which of the following statements is true?

• The conclusion is guaranteed.

• The conclusion is not guaranteed.

• There is a sufficient evidence to back up the claim.

• There is no sufficient evidence suggesting that the claim is false.

In a right-tailed test, if the critical value is greater than the computed value, then we____

• reject the null hypothesis

• fail to reject the null hypothesis

• reject both the null and alternative hypotheses

• support both the null and alternative hypotheses

Find the critical value of a right-tailed z-test with 𝛼 = 10%.

• z = 1.28

• z = 1.645

• z = 1.96

• z = 2.326

Tags

CCSS.HSS.ID.A.4

What should you do if the computed t-value lies in the critical region?

• Reject the null hypothesis.

• Fail to reject the null hypothesis.

• Reject both the null and alternative hypotheses.

• Support both the null and alternative hypotheses.

Tags

CCSS.HSS.ID.A.4

In a two-tailed test with 𝛼 = 0. 025, the z-computed value is 2.014, what are the critical values

• ±2.575

• ±2.326

• ±1.960

• ±1.645

What should you do if the computed t-value lies in the critical region?

• Reject the null hypothesis.

• Fail to reject the null hypothesis.

• Reject both the null and alternative hypotheses.

• Support both the null and alternative hypotheses.

Tags

CCSS.HSS.ID.A.4