Select the most appropriate pair of hypotheses for each statement. A human resou

Question

Select the most appropriate pair of hypotheses for each statement.

A human resource manager feels that on average men send more emails per day than women.

a.         H0: mM £ mW            H1: mM > mW

b.         H0: mM ³ mW            H1: mM < mW

c.         H0: mM = mW            H1: mM ¹ mW

d.         H0: pM £ pW             H1: pM > pW

e.         H0: pM ³ pW             H1: pM < pW

Anti-lock brake system (ABS) has been hailed as a revolutionary safety feature. A study by the National Highway Traffic Safety Administration looked at fatal accidents. The claim is that a smaller proportion of cars with ABS are in fatal crashes than those without ABS.

a.         H0: mwith £ mwithout                     H1: mwith > mwithout

b.         H0: m with ³ m without H1: m with < m without                 

c.         H0: m with = m without H1: m with ¹ m without

d.         H0: p with £ p without H1: p with > p without

e.         H0: p with ³ p without H1: p with < p without

When operating properly, a torque machine tightens bolts at an average of 120 lbs. To test whether the machine is operating properly, which of the following is the correct pair of hypotheses.

a.         H0: m = 120       H1: m   ¹ 120

b.         H0: m ³ 120       H1: m < 120

c.         H0: m £ 120       H1: m > 120

d.         H0: p £ 120       H1: p > 120

e.         H0: p ³ 120       H1: p < 120

A CPA review program is advertised as “guaranteed to improve your CPA test scores.”   Fifty graduating accounting students from a business school were randomly assigned to two groups – group in which students didn’t participate (D) in the review program and the other group participated (P) in the review program. Which is the correct statement of hypothesis for testing the claim?

a.        H0: mP = mD             H1: mP ¹ mD

b.        H0: mP ³ mD             H1: mP < mD

c.        H0: mP £ mD             H1: mP > mD

d.        H0: pP £ pD              H1: pP > pD

e.        H0: pP ³ pD              H1: pP < pD

A councilperson claims that there is a difference in the level of support to Measure 91 among Republican (R) and Democratic (D) voters in the Rogue Valley.

a.         H0: mR £ mD             H1: mR > mD

b.         H0: mR ³ mD             H1: mR < mD

c.          H0: mR = mD             H1: mR ¹mD

d.         H0: pR ³ pD              H1: pR < pD

e.         H0: pR = pD              H1: pR ¹ pD

In comparing the means of two independent samples, which of the following is a requirement for using the unpooled t-test procedure?

s12 = s22

s12 ¹ s22

s12 = s22

s12 ¹ s22

None of the above

Explanation / Answer

Solution:-

1) a) H0: mM < mW            H1: mM > mW

2) e) H0: pwith< pwithout  H1: pwith < pwithout

3) a) H0: m = 120       H1: m 120

4) c) H0: mP< mD             H1: mP > mD

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