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Which hypothesis-testing procedure would you use in the following situations?

 

 

·         The mean time an American family lives in a particular single-family dwelling is 11.8 years. A sample of 100 families in the Sycamore, OK area shows the mean time living in a single family residence is 12.7 years. Can we conclude that the time people live in Sycamore is significantly more than the national average?

 

 

·         A researcher would like to know if there is a significant difference in clothing purchases between full-time working women, part-time working women, and women who are homemakers.

 

 

·         Eighty percent of those who play the state lottery never win more than $100 in one play. A sample of 500 players was drawn and the mean winning was $125.

 

 

·         A drug manufacturing company conducted a survey of customers. The research question was as follows: Is there a significant relationship between packaging preference (size of the bottle purchased) and economic status? There were four packaging sizes: small, medium, large, and jumbo. Economic status was categorized as follows: lower, middle, and upper.

 

 

·         A company has 24 salespeople. The test must evaluate whether their product knowledge has improved or remained unchanged after a training program.

 

 

·         A computer company has a brand loyalty rating of 6.8 on a 7 point scale. Is this company’s rating significantly different from the industry average of 6.4?

 

 

·         The manager of an office supply store wanted to determine which color folders she should discontinue based on low sales. The colors stocked were black, blue, red, green, and purple.

 

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