Question

1. What is z Subscript alpha divided by 2z?/2 when alpha?equals=0.050.05??

A.

1.6451.645

B.

2.332.33

C.

1.961.96

D.

2.575

2.

The Business College Computing Center wants to determine the proportion of business students who have laptop computers. If the proportion is more than from? 30%, then the lab will modify a proposed enlargement of its facilities. Suppose a hypothesis test is conducted and the test statistic is 2.8. Find the ?p-value for a? one-sided test of hypothesis.

A.

.0013

B.

.4938

C.

.0026

D.

.0052

3.  

Consider the following printout. Is this a large enough sample for this analysis to? work?

?HYPOTHESIS: VARIANCE X	equals=	x
X	equals=	gpa
SAMPLE MEAN OF X	equals=	0.11540.11540
SAMPLE VARIANCE OF X	equals=	0.180.180000
SAMPLE SIZE OF X	equals=	170170
HYPOTHESIZED VALUE? (x)	equals=	2.32.3
VARIANCE Xminus?x	equals=	minus?0.11501150
z	equals=	negative 3.54645?3.54645

A.

No

B.

?Yes, since the population of GPA scores is approximately normally distributed.

C.

?Yes, since

npgreater than>15

and

nqgreater than>15.

D.

?Yes, since

nequals=170170?,

which is greater than 30.

Answer 1

$1.\ Z_{0.05/2}=Z_{0.025}=\mathbf{1.96}\ (C)$

2. P(Z>2.8) = 0.0026(C)