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

Not sexual            350         518                   245                1113

Sexual                  200          81                    115                 396

Total                    550          599                   360                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 α = 0.01. Round your value for χ² to two decimal places, and round your P-value to four decimal places.)

χ² =

P-value = 

Conclusion

a.) Reject the null hypothesis. There is significant evidence of an association between target audience and model dress.

b.) Reject the null hypothesis. There is not significant evidence of an association between target audience and model dress.

c.)  Fail to reject the null hypothesis. There is not significant evidence of an association between target audience and model dress.

d.)  Fail to reject the null hypothesis. There is significant evidence of an association between target audience and model dress.

(c) All of the ads were taken from the March, July, and November issues of six magazines in one year. Discuss this fact from the viewpoint of the validity of the significance test and the interpretation of the results.

a.)This is an SRS. This gives us no reason to believe our conclusions are suspect.

b.) This is not an SRS. This gives us reason to believe our conclusions might be suspect.

c.) This is not an SRS. This gives us no reason to believe our conclusions are suspect.

d.) This is an SRS. This gives us reason to believe our conclusions might be suspect.