Take Home FinalMicrosoft Word - Take Home xb Answered: My Drive Google x G 1) A doctor clalms that less th x+ > CO file:///Users/chasejamescanterbury/Dropbox/Online%2021%20Take%20HomeX20Final%20Plus%20Alternatives%202%20per%20page.pdf10) A group of 9 concertgoers was selected at random. Before the concert they were given ahearing test, and then given another one after the concert. (The volume varied during the test,and the subject also had to state which ear the sound was in.) Here are the number of correctlyidentified sounds out of 10, both before and after the concert.PersonAB.Before108.9.8.After8.8.10At the 0.05 level of significance, test a person's hearing is worse after being affected by thenoise of a concert.MacBook Air

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Asked Dec 12, 2019
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Please answer number ten. 

Take Home Final
Microsoft Word - Take Home x
b Answered: My Drive Google x G 1) A doctor clalms that less th x
+ > CO file:///Users/chasejamescanterbury/Dropbox/Online%2021%20Take%20HomeX20Final%20Plus%20Alternatives%202%20per%20page.pdf
10) A group of 9 concertgoers was selected at random. Before the concert they were given a
hearing test, and then given another one after the concert. (The volume varied during the test,
and the subject also had to state which ear the sound was in.) Here are the number of correctly
identified sounds out of 10, both before and after the concert.
Person
A
B.
Before
10
8.
9.
8.
After
8.
8.
10
At the 0.05 level of significance, test a person's hearing is worse after being affected by the
noise of a concert.
MacBook Air
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Take Home Final Microsoft Word - Take Home x b Answered: My Drive Google x G 1) A doctor clalms that less th x + > CO file:///Users/chasejamescanterbury/Dropbox/Online%2021%20Take%20HomeX20Final%20Plus%20Alternatives%202%20per%20page.pdf 10) A group of 9 concertgoers was selected at random. Before the concert they were given a hearing test, and then given another one after the concert. (The volume varied during the test, and the subject also had to state which ear the sound was in.) Here are the number of correctly identified sounds out of 10, both before and after the concert. Person A B. Before 10 8. 9. 8. After 8. 8. 10 At the 0.05 level of significance, test a person's hearing is worse after being affected by the noise of a concert. MacBook Air

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Expert Answer

Step 1

The appropriate Null and Alternative Hypotheses are given below:

 

From the given information, the claim of the problem is the person’s hearing is worse after being affected by the noise of a concert.

 

Null hypothesis:

 

H0: µbefore= µafter.

 

That is, the person’s hearing is same for before and after being affected by the noise of a concert.

 

Alternative hypothesis:

 

H1: µafter< µbefore.

 

That is, the person’s hearing is worse after being affected by the noise of a concert.

 

Here, the hearing test is given for same persons are compared. Hence, the appropriate test for given testing is paired t test.

 

The test statistic is -3.266 and it is obtained below:

 

Excel Procedure:

 

  1. Enter the data for before and after in Exc...
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t-Test: Paired Two Sample for Means Variable 1 Variable 2 Mean 7.444444444 8.777777778 Variance 2.527777778 0.444444444 Observations Pearson Correlation 0.694488704 Hypothesized Mean Difference df t Stat P(T<=t) one-tail -3.265986324 0.005712277 t Critical one-tail 1.859548038 P(T<=t) two-tail t Critical two-tail 0.011424554 2.306004135

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Hypothesis Testing

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