A market survey is conducted by your state legislator

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Mathematical Excursions
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Chapter 2 / Exercise 54
Mathematical Excursions
Aufmann
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6)A market survey is conducted by your state legislator to determine the proportion of homeowners who would switch to a new “electrical energy supplier” if they had the opportunity afforded them by new state legislation. Of the 1,200 homeowners surveyed, 900 said they would switch. At 5% level of significance interpret the results if the legislator states that more than 2/3 of the homeowners would switch.Fereydoun NikpourBASIC STATISTICAL METHODS – Summer 2017Quiz 6Student’s name:1) The correlation between two variables is =.76 for a sample of 18 observations. Which of the following is a correct conclusion based on the data? Use the .05 significance level. a) Reject H0. There is a negative association between the variables. b) Do not reject H0. There is a negative association between the variables. c) Reject H0. There is a positive association between the variables. d) None of the above.
2) Which of the following is a correct conclusion if r = 0.81, p-value = 0.076, t = 7.1, and α = 2%?
3) A coffeehouse wishes to see if customers have any preference among 5 different brands of coffee. A sample of 200 customers provided the data below. Is there a brand preference if P-value is 0%??Brand 1 2 3 Customers 30 65 18 32 4 555
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Mathematical Excursions
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Chapter 2 / Exercise 54
Mathematical Excursions
Aufmann
Expert Verified
4) YASI wants to see if there is a relationship between the field of study of Rutgers students and their political affiliation. Using a 1% level of significance, test the claim that these two variables are independent. P-value is 0.50
PartyChemistryPlanningNursingDemocratic81522Republican 1219165) A researcher wants to determine the proportion of patients of RWJ University Hospital who are happy with the performance of nurses while they were staying in the hospital, and he thinks it is about 60%. How large a sample is required to be 95% sure that the sample proportion is off by no more than 5%?
6) There have been complaints that resident physicians and nurses at the RWJ Hospital desk respond slowly to emergency calls from senior citizens who are medical patients. It is claimed that it takes 10 minutes for non-senior patients. A researcher randomly selected 100 senior citizens and found that on average it took 13 for the selected group of patients to receive proper medical response with the population standard deviation of 3 minutes. At the 0.02 level of significance can it be concluded that response time to emergency calls from senior citizens is longer than the other patients?1) What are the alternative and null hypotheses?2) What is the Level of Significance for this test?3) What is the computed Z value for this test?4) What is the computed p-value for this test?5) What is the decision?a) It takes longer for senior citizens to receive medical response.b) It takes almost the same time for senior citizens and non-senior citizens to receive medical response.c) It takes longer for non-senior citizens to receive medical response.d) None of the above.

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