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 RES342 – Quiz 1   Multiple Choice

 

1.  Of the following ordinary words, which one is most closely associated with the meaning of a hypothesis?

            a.   trial

            b.   decision

            c.   outcome

            d.   assumption

 

 

    2.     Whenever a hypothesis is tested, the evidence that is used to determine validity comes from the

            a.   decision.

            b.   conjecture.

            c.   sample data.

            d.   theory.

 

     

    3.     Borrowing from descriptions also associated with probability, the null hypothesis and the alternative hypothesis are in essence

            a.   mutually exclusive and exhaustive.

            b.   dependent and mutually exclusive.

            c.   dependent and exhaustive.

            d.   mutually exclusive and independent.

 

 

    4.     The rejection region is a range of values of the test statistic that will lead you to

            a.   reject the alternative hypothesis.

            b.   fail to reject the null hypothesis.

            c.   reject the null hypothesis.

            d.   fail to make a decision.

 

     

    5.     Three of the steps in the formal hypotheses testing procedure are as follows:

                              1.   Calculate the test statistic.

                              2.   Set up the null and alternative hypotheses.

      3.   Establish the level of significance and find the rejection region.

            The correct sequence for performing the three steps is

            a.   2, 1, 3

            b.   1, 2, 3      

            c.   2, 3, 1                  

            d.   3, 2, 1

 

 

 

 

 

    6.     A grocery store owner is interested in determining if the average weight of a package of ground beef sold in the store weighs one pound. An appropriate null hypothesis for this study is

            a.   H0: m= 1 lb

            b.   H0: m ¹ 1 lb          

            c.   H0: m > 1 lb

            d.   H0: m < 1 lb

 

    7.     The rejection region for a two-tail test that uses the standard normal distribution is that area under the distribution lying

            a.   between 0 and the positive cutoff value for Z.

            b.   between the positive cutoff value for Z and the negative cutoff value for Z.

            c.   between 0 and the negative cutoff value for Z.

            d.   to the right of the positive cutoff value for Z and to the left of the negative cutoff value for Z.

 

    8.     The correct procedure for finding the rejection region for a two-tail test before looking up the cutoff value for Z in the standard normal table is to take the value of a and

            a.   double it.

            b.   halve it.

            c.   use it at face value.

            d.   subtract it from 1.

 

    9.     A restaurant manager thinks that the average bill paid by his customers is $25. To test his hypothesis, the next 50 tabs are tallied. All of them are over $25. Therefore, he can conclude immediately that the average bill paid by all of his customers

            a.   exceeds $25.

            b.   equals $25.

            c.   is less than $25.

            d.   may be less than, equal to, or greater than $25.

 

  10.     The p value is the ___________ value for a for which you can ___________.

            a.   smallest, reject H0.

            b.   smallest, not-reject H0.

            c.   smallest, reject HA.

  1. largest, reject HA.

 

     

  11.     Whenever a two-tail test is being conducted, the rule of thumb is that the testing procedure requires that the view with the __________ sign remain in the __________ hypothesis.

            a.   =, null.

            b.   ¹, null

            c.   >, alternative

            d.   =, alternative

      

  12.     The appropriate alternative hypothesis for a two-tail test to determine if mean body weight of all the men who have joined a health club is 185 pounds would be

            a.   HA: m = 185 lb.

            b.   HA: m < 185 lb.    

            c.   HA: m > 185 lb.    

            d.   HA: m¹ 185 lb.   

 

  13.     The appropriate alternative hypothesis for a lower-tail test to determine if mean body weight of all the men who have joined a health club is less than 185 pounds would be

            a.   HA: m ³ 185 lb.

            b.   HA: m < 185 lb.   

            c.   HA: m = 185 lb.    

            d.   HA: m ¹ 185 lb.

        

 

Use the following table when answering Questions 14 - 15:

Data Indicates You Should:

The Actual Situation:

H0 is True

HA is True

 

Believe H0

 

 

A

 

 

B

 

 

Believe HA

 

C

 

D

 

 

     

  14.     The correct missing description of the conditions defined by cell B is

            a.   Type I error committed.

            b.   Type II error committed.

            c.   you correctly believe a true null hypothesis.

            d.   you correctly reject the null hypothesis.

 

     

  15.     The correct missing description of the conditions defined by cell D is

            a.   Type I error committed.

            b.   Type II error committed.

            c.   you correctly believe a true null hypothesis.

            d.   you correctly reject the null hypothesis.

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