Question

Chapter 6, Section 5, Exercise 252 Testing whether Story Spoilers Spoil Stories A story spoiler gives...

Chapter 6, Section 5, Exercise 252

Testing whether Story Spoilers Spoil Stories

A story spoiler gives away the ending early. Does having a story spoiled in this way diminish suspense and hurt enjoyment? A study1 investigated this question. For twelve different short stories, the study’s authors created a second version in which a spoiler paragraph at the beginning discussed the story and revealed the outcome. Each version of the twelve stories was read by at least people and rated on a to scale to create an overall rating for the story, with higher ratings indicating greater enjoyment of the story. The ratings are given in Table 1 and stored in StorySpoilers. Stories to were ironic twist stories, stories to were mysteries, and stories to were literary stories. Test to see if there is a difference in mean overall enjoyment rating based on whether or not there is a spoiler.

1Leavitt, J. and Christenfeld, N., ‘‘Story Spoilers Don’t Spoil Stories,” Psychological Science, published OnlineFirst, August 12, 2011.

Story

1

2

3

4

5

6

7

8

9

10

11

12

With Spoiler

4.7

5.1

7.9

7

7.1

7.2

7.1

7.2

4.8

5.2

4.6

6.7

Original

3.8

4.9

7.4

7.1

6.2

6.1

6.7

7

4.3

5

4.1

6.1

                               

Give the test statistic and the -value.

Round your answer for the test statistic to two decimal places and your answer for the -value to four decimal places

test statistic Entry field with incorrect answer

-value Entry field with incorrect answer

               

Give the conclusion.

Reject .

Do not reject .

               

Is there evidence of a difference in enjoyment rating based on whether or not there is a spoiler?

No evidence of a difference

There is evidence of a difference and mean enjoyment is greater without a spoiler

There is evidence of a difference and mean enjoyment is greater with a spoiler

Homework Answers

Answer #1

from above test statistic t =4.90

p value =0.0005

reject Ho

There is evidence of a difference and mean enjoyment is greater with a spoiler

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