List down five (5) different real-life situations where hypothesis testing can be done. Identify the parameter to be tested in each situation.
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Q: what was the margin of error for this study?
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Q: how did you get 2x in part c?
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A: (d)
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A: Solution: From the given information, the p.d.f of hyper geometric distribution is
Q: What is the critical value for a right-tailed test with a = 0.01 andn= 75? A 1.645 1.96 2.33 D 2.575
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Q: Please answer D7 and D9
A: Solution-: We want to find D7=? and D9=?
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- Our goal is to see whether the global temperatures have been getting higher. For the following statement, how should the hypothesis be phrased? What are some important characteristics of appropriate an hypothesis? State a null and alternative hypothesis for the problem at hand.A sociologist recorded the number of contacts entered in a cell phone and the number of texts sent in a week for 20 cell phone users. The resulting data were used to conduct a hypothesis test to investigate whether there is a linear relationship between the number of contacts and the number of texts sent. What are the correct hypotheses for the test? H0:β1=0Ha:β1≠0H0:β1=0Ha:β1≠0 A H0:β1=0Ha:β1>0H0:β1=0Ha:β1>0 B H0:β1=0Ha:β1<0H0:β1=0Ha:β1<0 C H0:β1≠0Ha:β1=0H0:β1≠0Ha:β1=0 D H0:b1=0Ha:b1≠0 EAnswer A, B1, and B2: A. The National Institute of Mental Health published an article stating that in any one-year period, approximately 9.5 percent of American adults suffer from depression or a depressive illness. Suppose that in a survey of 100 people in a certain town, seven of them suffered from depression or a depressive illness. Conduct a hypothesis test to determine if the true proportion of people in that town suffering from depression or a depressive illness is lower than the percent in the general adult American population. B. Researchers interested in lead exposure due to car exhaust sampled the blood of 52 police officers subjected to constant inhalation of automobile exhaust fumes while working traffic enforcement in a primarily urban environment. The blood samples of these officers had an average lead concentration of 124.32 µg/l and a SD of 37.74 µg/l; a previous study of individuals from a nearby suburb, with no history of exposure, found an average blood level…
- A media report stated "71% of the population of all Irish consumers are unwilling to pay for online news, and of those who do, almost half pay less than e50 per year”. A business student surveyed a random sample of 20 Irish consumers and calculated that 65% of the sample were unwilling to pay for online news. Which one of the following statements are true: (a) The value 71% is a statistic and the value 65% is a parameter. (b) The value 71% is a statistic and the value 65% is a statistic (c) The value 71% is a parameter and the value 65% is a statistic.1.Which is the alternative hypothesis? a. There is a significant difference between a person's age and the number of hours he or she sleeps. b. There is no significant relationship between a person's age and the number of hours he or she sleeps. c. There is a significant relationship between a person's age and the number of hours he or she sleeps. d. There is no significant difference between a person's age and the number of hours he or she sleeps. 2. What is the df? 3. What is the critical value from the table?Which of the following statements correctly describe estimation? a. It is the process of inferring the values of known population parameters from those of unknown sample statistics. b. It is the process of inferring the values of unknown population parameters from those of known sample statistics. c. It is the process of inferring the values of known sample statistics from those of unknown population parameters. d. It is the process of inferring the values of unknown sample statistics from those of known population parameters.
- Identify the appropriate hypothesis test for each of the following research situations. A researcher conducts a between-subjects study to determine whether there is a significant difference in problem-solving ability between older adults who are generally happy and those who are generally unhappy. A researcher gives a questionnaire to a group of 30-year-old married adults, including questions to measure the stability of their own marriages and the stability of their parents’ marriages. The researcher would like to know whether the two variables are related. A researcher obtains a sample of 100 college students between 18 and 21 years old and a similar sample of 100 young adults who have no college experience. The researcher would like to know if there is a difference in the proportion of registered voters for the two groups.Many questions in research can be expressed as two competing statements about the population parameter. These two statements are called the null and the alternative hypotheses. Usually, the researcher hopes the sample evidence will be in favor of the alternative hypothesis, the new theory. It is important to be able to state the theories that are being put to a test. Write out the hypotheses to be put to the test and define the parameter of interest in context of the problem. Do a minority of Michigan residents clear snow from sidewalks before 9 am after snow has fallen?For this scenario, write out the hypotheses to be put to the test and define the parameter of interest in context of the problem. H0:Ha: The parameter p represents ___(provide appropriate definition in context)________One morning a local affiliate of national public radio show had an episode about parks in Idaho. During the show they asked listeners to respond to a poll and answer whether they had been camping in an Idaho park in the last year. 1287 responded, and 1003 said they had camped in an Idaho park in the last year. They hoped this would give some indication of whatproportion of all Idahoans go camping annually. (a) What is the population?(b) What is the parameter (of interest)?(c) What is the sample?(d) What is the statistic?(e) What is the most likely/obvious bias for this sample?
- The null and alternative hypotheses are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed and the parameter that is being tested.H0: μ = 8.6 H1: μ ≠ 8.6 a.Left-tailed, b.Right-tailed, μ c.Two-tailed, μ d.Two-tailed,20. Which of the following is a null hypothesis? a. Pregnant women who drink cranberry juice will have lower urine bacterial counts than those who do not drink cranberry juice. b. The urine bacterial count of pregnant women who drink cranberry juice will be lower or equal to that of pregnant women who do not drink the juice. c. There will be a difference between ingestion of cranberry juice and among pregnant women who do and do not have high urine bacterial counts.Part A H0: >=13%,<= 170%,<=13%,>=1370% HA: >=13%,<= 170%,<=13%,>=1370% Part B P- Value is: .03, .25, .001, .053 Null Hypothesis: accepted/rejected Company should decide to: continue broadcasting/cancel