Hypothesis Testing--Review #1

True or False:

The null hypothesis is always µ = #.

• True

• False

True or False:

The alternate hypothesis is always µ < #

µ > # or

µ =/ #.

• True

• False

True or False:

Your null and alternate hypotheses should always have the same number value.

• True

• False

Suppose the P-value for a hypothesis test is 0.0304.  Using a = 0.05, what is the appropriate conclusion?

•   a)  reject the null
• b)  reject the alternative
• c)  Accept the null
• d)  Fail to reject the alternative

Which of the following shows a right-tailed test?

• Ha: µ < 15
• H₀: µ < 15
• Ha: µ > 15
• H₀: µ > 15

A left-tailed test has a test statistic of z = -2.72. Which is the correct p-value?

• 0.0033

• 0.0048

• 0.0096

• 0.0066

Suppose the P-value for a hypothesis test is 0.0304.  Using a = 0.05, what is the appropriate conclusion?

•   a)  reject the null
• b)  reject the alternative
• c)  Fail to reject the null
• d)  Fail to reject the alternative

Which of the following shows a right-tailed test?

• H₁: µ < 15
• H₀: µ < 15
• H₁: µ > 15
• H₀: µ > 15

A two-tailed test with n = 41 has a test statistic z = 1.56. Which is the correct p-value?

• 0.0594

• 0.9406

• 0.4703

• 0.1188

What is the critical value for a left-tailed test with α = 0.05?

• z = -1.645

• z = -2.33

• z = -1.96

• z = 2.58