The contingency table shows a random sample of engineering, psychology, and biology articles and if and how they were coauthored. At a = 0.01, can you conclude that the subject Coauthorship matter and coauthorship are related? Complete parts (a) through (d). Subject matter Engineering Psychology Biology Coauthored 47 46 48 Internationally coauthored Not coauthored 32 6 18 37 44 40 (a) Identify the claim and state the null and alternative hypotheses. Ho: Coauthorship and subject matter are Ha: Coauthorship and subject matter are The is the claim. (b) Calculate the test statistic. If convenient, use technology. =(Round to three decimal places as needed.) (c) Decide to reject or fail to reject the null hypothesis. Then interpret the decision in the context of the original claim. What is the conclusion of the test? V Ho. There V enough evidence to support Ha- How does this relate to the original claim? O A. This does not support the claim that subject and coauthorship are not related. O B. This supports the claim that subject and coauthorship are not related. OC. This does not support the claim that subject and coauthorship are related. O D. This supports the claim that subject and coauthorship are related.

How do high school students feel about trust and honesty in the workplace? A random sample of 9542 high school males, and a separate random sample of 11,420 high school females were asked whether they though trust and honest were essential in business and the workplace. Here are the results.     Male Female Total Agree 9097 10935 20032 Disagree 445 485 930 Total 9542 11420 20962   a) Use PMACC (clearly label each step on your paper) to determine if there is a difference in the distribution of how high school students feel about trust and honest in business and the workplace among males and females. Use a significance level of 0.05.   b) Show how to calculate the expected count for males who disagree.

16. Researchers claim that 60 tissues are the average number of the tissues a person uses during the course of a flue. The company who makes Kleenex brand tissues that thinks that fever of the tissues are needed. What are their null and alternative hynothesis 17. A randomly selected ample of 1,000 college students was asked whether they had ever drunk alcohol. Sixteen percent of the 1000 students surveyed said they had. Which one of the following statements about the number 0.16 is correct? A. Itis a sample proportion B. It is a population proportion C. It is a margin error D. It is a randomly chosen number 18. A random sample of 100 voters in a community produced 59 voters in faxour of candidate A. The observed value of the test statistics for testing the null hypothesis Ho pi = 0.5 versus the alternative hypothesis Ha pi is not equal to 0.5. a (0.05) А. 1.80 В. 1.90 С. 1.83 D. 1.28

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A high school track coach wanted to test whether giving the students an energy drink could affect performance during the 100 meter race. The coach split the 26 boys into two equal sized groups, where Group 1 was given the energy drink and Group 2 was not. The 100 meter race times were recorded during practice and shown in the table below. What inference can be made about the results? Group 1 Group 2 12.2 13 12.5 12.3 13.3 12.8 12.9 13 13 13.8 12.1 13 13 13 13 13 12.1 13 13 13 12.1 13 12.8 13 13 12.6     Mean: 12.7 Mean: 13   Since the simulation shows ( many cases or free cases )?  where a mean  difference of ( solve for this answer )   or less occurred when the groups were re-randomized, it can be inferred that the mean difference observed in the study was ( very possibly or very unlikely )  ?due to the random assignment of participants into groups, so the results of the study are (…

Management of a company that produces a medical device has carefully selected and screened 220 finished items (packaged, ready to ship).  The team agrees that the sample contains 33 defective items, all for various visual defects on the package such as crooked labels, poor seal, errant marks on package, etc.  The items are then given to an inspector for classification into “defective” and “non-defective” piles.  The inspector ends up rejecting 9 non-defective items, and accepting 11 defective items.  The inspector classifies the remaining items in the sample correctly.  Find the following (answer as a probability, NOT a percentage. Use 3 decimal places.  Notice that alpha = 9/187, Beta = 11/33, and p = 33/220. P(inspector accepts the item and its actually non-defective) =

Management of a company that produces a medical device has carefully selected and screened 220 finished items (packaged, ready to ship).  The team agrees that the sample contains 33 defective items, all for various visual defects on the package such as crooked labels, poor seal, errant marks on package, etc.  The items are then given to an inspector for classification into “defective” and “non-defective” piles.  The inspector ends up rejecting 9 non-defective items, and accepting 11 defective items.  The inspector classifies the remaining items in the sample correctly.  Find the following (answer as a probability, NOT a percentage. Use 3 decimal places: What is the proportion of accepted items that are actually defective (escapes)?

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