QNT561Week3QuizPart4 - 64712

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1. What is the level of significance of a test of hypothesis?

2. For each of the following rejection regions, sketch the sampling distribution for z and indicate the location of the rejection region, and determine the probability that a Type I error will be made.

3. Several years ago, a government agency reported the default rate (the proportion of borrowers who default on their loans) on a certain type of loan at 0060. Set up the null and alternative hypotheses to determine if the default rate this year is different from 0.060.

4. For the a and observed significance level (p«va1ue) pair, indicate whether the null hypothesis would be rejected.

5. A study analyzes recent incidents involving terrorist attacks. Data on the number of individual suicide bombings that occurred in each of 20 sampled terrorist group attacks against a country is reproduced in the data table below. An Excel/DDXL printout is shown to the right. Complete parts a through e.

6. Suppose 66 of 110 randomly selected shoppers believe that "Made in the USA" means that 100% of labor and materials are from the United States. Let p represent the true proportion of consumers who believe "Made in the USA" means 100% of labor and materials are from the United States. Complete parts a through e.

7. Independent random samples from approximately normal populations produced the results shown below. Complete parts a and b.

8. The data for a random sample of six paired observations are shown in the table.

9. Construct a 90% confidence interval for (p1- pa) in each of the following situations.

10. A newspaper reported the results of a survey on the planning habits of men and women In response to the question What is your preferred method of planning and keeping track of meetings, appointments, and deadlines? 55% of the men and 44% of the women answered "I keep them in my head" A nationally representative sample of 1,000 adults participated in the survey; therefore, assume that 500 were men and 500 were women Complete parts a through e.

11. An auto dealer researching customer preferences for automobiles asks customers which colors they prefer in a car from a choice of (red, yellow, black and white). The data being collected can be categorized as a(n) scale.

12. Which of the following choices determines the extent to which a measuring instrument measures what the researcher sets out to measure?

13. Which type of scale consists of statements that express either a favorable or unfavorable attitude toward an object of interest?

14. The assignment of numbers or symbols to a property of objects according to value or magnitude is called:

15. Rachel is conducting telephone interviews for Blockbuster on perceptions of its new "No Late Fees" program. When she interviews customers of the Netl-']ix service, she tends to change the wording of the question, "How loyal are you to using Blockbuster for your DVD rental needs?" to "So you aren't loyal to Blockbuster, are you?" Which of the following sources of error in communication research is present in this example?

16. Every time a Netflix customer returns a DVD, Netflix asks the customer to evaluate the DVD relative to other DVDs on a scale of one to five. A five means that the customer thought this DVD was better than most others while a one means that the DVD is among the worst. In this example, Netflix is using a(n) question to learn customer preferences.

17. When target questions present the participants with a fixed set of choices, they are:

Solution Description

1. What is the level of significance of a test of hypothesis?

2. For each of the following rejection regions, sketch the sampling distribution for z and indicate the location of the rejection region, and determine the probability that a Type I error will be made.

3. Several years ago, a government agency reported the default rate (the proportion of borrowers who default on their loans) on a certain type of loan at 0060. Set up the null and alternative hypotheses to determine if the default rate this year is different from 0.060.

4.

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