1. It is a rule or method that leads to decision to accept or reject the hypothesis when sample values are gathered from the population under study. A. Estimation C. Hypothesis Testing D. Test Statistic B. Hypothesis 2. What mathematical model is appropriate for decision-making about population proportion? A. Graphical representation C. z- statistic B. Normal curve D. None of these 3. This refers to an intelligent guess, an assumption, or a claim about a population parameter which may either be true or false. A. Hypothesis B. Test statistic C. Decision D. Interpretation
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- A statistical program is recommended. Jensen Tire & Auto is in the process of deciding whether to purchase a maintenance contract for its new computer wheel alignment and balancing machine. Managers feel that maintenance expense should be related to usage, and they collected the following information on weekly usage (hours) and annual maintenance expense (in hundreds of dollars). Weekly Usage(hours) AnnualMaintenanceExpense 13 17.0 10 22.0 20 30.0 28 37.0 32 47.0 17 30.5 24 32.5 31 39.0 40 51.5 38 40.0 #1) Develop the estimated regression equation that could be used to predict the annual maintenance expense (in hundreds of dollars) given the weekly usage (in hours). (Round your numerical values to two decimal places.) #2) The expected expense of a machine being used 34 hours per week is $ hundred.A nonprofit company concerned with the school dropout rates has designed a tutoring program aimed at students between 16 to 18 years old. A national center for educational statistics reported that the high school dropout rate for the year 2000 was 10.9%.One school district, who adopted the use of the nonprofit's tutoring program and whose dropout rate has always been very close to the national average, reported in 2004 that 158 of their 1769 students dropped out. Is their experience evidence that the tutoring program has been effective? Determine the hypotheses for this test. Choose the correct answer below A. H0: p=0.109 HA: p≠0.109 B. H0: p≠0.109 HA: p=0.109 C. H0: p=0.109 HA: p<0.109 D. H0: p=0.109 HA: p≥0.109 E. H0: p≥0.109 HA: p=0.109 F. H0: p≤0.109 HA: p=0.109 Compute the test statistic. enter your response here *______* Find the P-value. enter your response here* ______* 3. Is their experience evidence that the tutoring…A school psychologist notes that the average number of times that students are disrup- tive during class is 1.4 (u 1.4] times per day Following recent classroom policy changes the psychologist tests if the number of disrup- tions during class has changed. He records the following number of disruptions observed during a class day: 2, 4,3, 5, 4, 1, 1, and 4 1. Test the hypothesis that the number of complaints has increased or decreased using a .05 level of significance. State the value for the test stastistic and the decision to retain or rejct the null hypothesis. 2.compute effect size using estimated Cohen's D.
- A 2015 New York Times/CBS News poll sampled 523 adults who were planning a vacation during the next six months and found that 141 were expecting to travel by airplane. A similar survey question in a May 2005 New York Times/CBS News poll found that of 477 adults who were planning a vacation in the next six months, 81 were expecting to travel by airplane. Let 2015 be population 1. State the hypotheses that can be used to determine whether a significant change occurred in the population proportion planning to travel by airplane over the 10-year period. Let 0.01 be the level of significance. Use α=0.01 and test for a significant difference. What is the value of the test statistic?Utilizing the previous table: A sample of 25 cities have been classified as high or low on their homicide rates and on the number of handguns sold within the city limits. Was the null hypothesis rejected or accepted?A May 26, 2020 Gallop poll reported on daily stress before the COVID-19 pandemic and during it. For purposes of educational practice, similar data is used for this problem, refer to if interested in the Gallup report and resource links. During COVID-19, 51% of the 2263 male and 62% of the 837 female SBOs reported feeling daily stress (this is an increase over prior reports of daily stress).(a) What are the hypotheses for evaluating if the proportions of male and female small business owners feeling daily stress were different? __Ho: pmale = pfemaleHa: pmale < pfemale __Ho: pmale = pfemaleHa: pmale > pfemale __Ho: pmale = pfemaleHa: pmale ≠ pfemale (b) The p-value for this hypothesis test is approximately 0.0002 Explain what this means in context of the hypothesis test and the data. Since p ≥ α we do not have enough evidence to reject the null hypothesis Since p<α we reject the null hypothesis and accept the alternative Since p ≥ α we accept the null hypothesis Since p ≥ α…
- The following table shows the cross-classification of accounting practices (either straight line, declining balance, or both) and country (either France, Germany, or United Kingdom). France Germany United Kingdom Straight Line 20 11 30 Declining Balance 14 16 15 Both 15 23 13 Set up the competing hypotheses to determine if accounting practice and country are dependent. What is the degrees of freedom for the test. Calculate the value of the test statistic ( x2 ).Suppose an economist wishes to estimate the mean commute time of workers in Westchester County. The economist obtains a random sample of 31 commutes in Westchester County and finds the sample mean to be 31.2 minutes and the sample standard deviation to be 12.1 minutes. a. Construct and interpret a 90% confidence interval for the mean commute time in Westchester County. b. Construct and interpret a 95% confidence interval for the mean commute time in Westchester County.A tech company wishes to study the number of production facilities that rely on new technologies, like 3D printers. Let the mean number of 3D printers used in a facility be μ. If the tech company wants to know if the number of 3D printers is, on average, less than 9 3D printers per facility, what are the null and alternative hypotheses? Select the correct answer below: H0: μ=9; Ha: μ≠9 H0: μ=9; Ha: μ>9 H0: μ<9; Ha: μ=9 H0: μ=9; Ha: μ<9
- From 300 electrical components selected at random from the product of a factory 15 of them are defective. Use formula and test the claim that the proportion of defective items is less than 0.06. Use 2 decimal places. a) write the hypotheses b) calculate the test statistic by using formula c) calculatethep-valueusing Minitab and report the supported graph d) write the meaning of the p-value in words e) make decision by using p-value and using the significance level 10%. f) write an overall interpretation about the research question. g) Explain and check the conditions that are required for the test to be valid.The following table shows the cross-classification of accounting practices (either straight line, declining balance, or both) and country (either France, Germany, or United Kingdom). France Germany United Kingdom Straight Line 20 11 30 Declining Balance 14 16 15 Both 15 23 13 Set up the competing hypotheses to determine if accounting practice and country are dependent. What is the degrees of freedom for the test. c. Calculate the value of the test statistic ().Determine the simplest type of statistical analysis that would be appropriate to use for comparing the average number of hours per week spent on Facebook by male and female students of Wanbol University , based on a random sample of 10 students. There was an outlier in one of the groups. A. Mann-Whitney U Test B. Kruskal-Wallis C. Two sample t-test