In the past, credit card customers spent $3064 on average. To investigate whether the recent change of economy has affected the spending of the credit card customers, a marketing department of a bank selects a random sample of 87 customers for a survey. Based on the survey result, it is found that the selected customers are spending $3147 on average with a standard deviation of $448. At 5% level of significance, is there any evidence to conclude that the spending of the credit card customers has increased?

The( )(A:true B:alternative C:false D:null)

hypothesis H0 in this test is:

X=3147

X3147

<3147

<3064

X>3147

X3147

>3064

X=3064

=3147

3147

=3064

3147

>3147

X>3064

X3064

3064

3147

X<3064

X3147

3064

X3064

X3064

3064

X<3147

and the( )

A:null

B:true

C:alternative

D:false

hypothesis H1 is:

3064

X3064

3147

=3147

3147

X<3064

<3147

X<3147

X3147

X3064

=3064

X>3147

X3064

X>3064

X3147

X3147

X=3064

>3064

<3064

>3147

3147

X=3147

3064

3064

The( )(level of confidence power of the test level of significance chosen in it) =( )[give a value between 0 and 1 correct to 4 decimal places].

The( )(population size sampling rate sample size chosen in it)n=( ).

The chosen test statistic is:

Z=+(p)/(1)/n

t=+(r)/+(1r2)/(n2)

t=+(X)/(S/n)

Z=+(X)/(/n)

2=+(fofe)2/fe

and the test should be a( )(lower-tail two-tail upper-tail chosen in it)test.

The critical value is( )[give a positive value correct to 4 decimal places].

The decision rule is then:

Reject( ) (H1 H0 chosen in it)

if( )(test statistic = critical value test statistic < -critical value test statistic NOT= critical value test statistic > critical value OR test statistic < -critical value test statistic > critical value test statistic = critical value OR test statistic = -critical value -critical value < test statistic < critical value chosen in it) ;

Do not reject( )(H0 H1 chosen in it) otherwise.

From the given data, the test statistic is found to be( ) [correct to 4 decimal places].

Hence,( )(H0 is rejected H1 is not rejected H0 is not rejected H1 is rejected chosen in it

and there is sufficient insufficient chosen in it

evidence that the spending of the credit card customers has unchanged changed decreased increased chosen in itat the 0.05 level of significance.

It is a complete question