In what ways do advertisers in magazines use sexual imagery to appeal to youth?
ID: 3065097 • Letter: I
Question
In what ways do advertisers in magazines use sexual imagery to appeal to youth? One study classified each of 1509 full-page or larger ads as "not sexual" or "sexual," according to the amount and style of the dress of the male or female model in the ad. The ads were also classified according to the target readership of the magazine. Here is the two-way table of counts. Magazine readership Model dress Women Men General interest Total 243 Not sexa 340 527 Sexual 1110 207 98 94 399 Total 547 625 337 1509 (a) Summarize the data numerically and graphically. (Compute the conditional distribution of model dress for each audience. Round your answers to three decimal places.) Women Men General Not sexual Sexual (b) Perform the significance test that compares the model dress for the three categories of magazine readership. Summarize the results of your test and give your conclusion. (Use a 0.01. Round your value forx to two decimal places, and round your P-value to four decimal places.) P-value-Explanation / Answer
Result:
a).
Expected Frequencies
Column variable
Row variable
C1
C2
C3
Total
R1
402.366
459.742
247.893
1110
R2
144.634
165.258
89.107
399
Total
547
625
337
1509
b).
Calculations
fo-fe
-62.3658
67.2584
-4.8926
62.3658
-67.2584
4.8926
(fo-fe)^2/fe
9.6666
9.8397
0.0966
26.8919
27.3735
0.2686
Data
Level of Significance
0.01
Number of Rows
2
Number of Columns
3
Degrees of Freedom
2
Results
Critical Value
9.21034
Chi-Square Test Statistic
74.13684
p-Value
0.0000
Reject the null hypothesis
Chi square = 74.14
P=0.0000
Reject the null hypothesis. There is significant evidence of an association between target audience and model dress.
c).
This is not an SRS. This gives us reason to believe our conclusion might be suspect.
Expected Frequencies
Column variable
Row variable
C1
C2
C3
Total
R1
402.366
459.742
247.893
1110
R2
144.634
165.258
89.107
399
Total
547
625
337
1509
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