A) H 1 : At least one of j 0for j = 1, 2,3 B) H 1 : 0 = 1 = 2 = 3 0 C) H 1 : At

Question

A)H1: At least one of j 0for j = 1, 2,3
B)H1: 0 = 1 =2 =3 0
C)H1: At least one of j 0for j = 0, 1,2, 3
D)H1: 1 = 2 =3 0

46. Using the hat matrix elements hitodetermine influential points in a multiple regression modelwithk independent variable and nobservations,Xi is an influential point if

A)hi> n(k + 1)/2
B)hi> 2(k + 1)/n
C)hi< n(k + 1)/2
D)hi< 2(k + 1)/n

47. The method of least squares is used on time-seriesdatafor

A)obtainingthe trend equation.
B)exponentiallysmoothing a series.
C)eliminatingirregular movements.
D)deseasonalizingthe data.

48. TABLE 17-1

The following payoff table shows profits associated with a set of3alternatives under 2 possible states of nature.

States      A1      A2      A3

  1          12     -2        8

  2            4     10        5

where: S1 is state of nature 1 A1 isactionalternative 1
S2 is state of nature 2 A2 is actionalternative2
A3 is action alternative 3


Referring to Table 17-1, if the probability of S1 is0.5,then the coefficient of variation for A2 is

A)2
B)1.5
C)0.231
D)0.5

49. Which of the following is NOT one of Deming's 14 points?

A)Awardbusiness on the basis of price tag alone.
B)Breakdown barriers between staff areas..
C)Createconstancy of purpose for improvement of product orservice.
D)Driveout fear.

50.TABLE 11-2

An airline wants to select a computer software package foritsreservation system. Four software packages (1, 2, 3, and 4)arecommercially available. The airline will choose the packagethatbumps as few passengers, on the average, as possible duringamonth. An experiment is set up in which each package is usedtomake reservations for 5 randomly selected weeks. (A total of20weeks was included in the experiment.) The number ofpassengersbumped each week is obtained, which gives rise to thefollowingExcel output:

ANOVA



Referring to Table 11-2, at a significance level of 1%,

A)thereis insufficient evidence to conclude that the average numbersofcustomers bumped by the 4 packages are all the same.
B)thereis insufficient evidence to conclude that the average numbersofcustomers bumped by the 4 packages are not all the same.
C)thereis sufficient evidence to conclude that the average numbersofcustomers bumped by the 4 packages are all the same.
D)thereis sufficient evidence to conclude that the average numbersofcustomers bumped by the 4 packages are not all thesame

Explanation / Answer

45.A) H1 : At least one of j 0 for j = 1, 2, 3 46.B) hi > 2(k + 1)/n 47.A) obtaining the trend equation. 48.D) 0.5 49.A) Award business on the basis of price tag alone. 50.B) there is insufficient evidence to conclude that the averagenumbers of customers bumped by the 4 packages are not all thesame.

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