Many investors and financial analysts believe the dow jones industrial average (djia) provides a good barometer of the overall stock market. on january 31, 2006, 9 of the 30 stocks making up the djia increased in price (the wall street journal, february 1, 2006). on the basis of this fact, a financial analyst claims we can assume that 30% of the stocks traded on the new york stock exchange (nyse) went up the same day.

1. formulate null and alternative hypotheses to test the analyst's claim.

h0: p
ha: p

2. a sample of 50 stocks traded on the nyse that day showed that 24 went up. what is your point estimate of the population proportion of stocks that went up (to 2 decimals)?

3. conduct your hypothesis test using = .01 as the level of significance.

calculate the value of the test statistic (to 2 decimals).

what is the p-value (to 4 decimals)?

can you conclude that the proportion of stocks going up is not .30?

answer:

payment just for service  

→

$

87.12

payment for service including tax

→

$

94.09

explanation:

service only with 20% tip  

→

$

72.6

(

1

+

20

100

)

=

$

87.12

in the opening of the question the word 'service' is associated only with the pretax value.

the closing part of the question asks: how much did she pay for the  

service

−−−−−−  

so technically the answer is  

→

$

72.6

(

1

+

20

100

)

=

$

87.12

however, the intention of the question provider may have been that your answer is to be  

$

87.12

(

1

+

8

100

)

=

$

94.09

to 2 decimal places.

'

payment just for service  

→

$

87.12

payment for service including tax

→

$

94.09

tony b

mar 21, 2017

answer:

trying to explain it another way

explanation:

service charge  

.

→

$

72.60

20% tip  

20

100

×

$

72.60

=

$

14.52

−−−−−−  

←

add

$

87.12

tax  

8

100

×

$

87.12

=

$

6.97

−−−−−  

←

add

$

94.09

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