Ho: salary and gender are dependentHa: salary and gender are independentHo: salary and gender are independentHa: salary and gender are dependent A researcher wants to study the relationship between salary and gender. She randomly selects 218 individuals and determines their salary andgender. Can the researcher conclude that salary and gender are dependent?IncomeStep 1 of 8: State the null and alternative hypothesis.MaleBelow $25,000 18$25,000-$50,000 3523$50,000-$75,000 2660Above $75,0002618105 113Female Total1230588644218TotalCopy Data

The question is about categorical data analysis.Given :To find :Can the researcher conclude that the…

Answered: A researcher wants to study the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Buckle up! - How does seat belt use vary with drivers' ethnic group? It is well known that location and gender (males are less likely to buckle up) are factors. Here is the data and the mosaic plot for a random sample of male drivers observed in Houston. Ethnic group of driver Belted Not Belted Total Black 277 99 376 Hispanic 373 164 537 White 197 62 259 Total 847 325 1172 Ethnicity Hispanic Black White Use of Seat Belt wearing a seat belt not wearing a seat belt
A student surveyed a random sample of 301 students in her large college and collected the data in the table below, on the variables class year and favorite team sport. Perform a chi-square test to determine if the variables class year and favorite team sport are independent. Basketball Soccer Baseball/Softball Other Total Freshman 12 41 11 1 65 Sophomore 12 43 17 7 79 Junior 10 44 10 11 75 Senior 10 49 18 5 82 Total 44 177 56 24 301 What is the test statistic for the chi-squared test? (round to 3 dp) . The p-value for this test is . (If p-value <0.001, enter 0, otherwise report to 4 dp) Select the appropriate conclusion for this test at a significance level of α=0.05.A. Reject H0H0. We have significant evidence that class year and team sports are not independent.B. Fail to reject H0H0. We do not have significant evidence that class year and team sports are not independent.
This question refers to excavations at a national monument. One question the archaeologists asked was: Is raw material used by prehistoric Indians for stone tool manufacture independent of the archaeological excavation site? Two different excavation sites gave the information in the following table. Use a chi-square test with 5% level of significance to test the claim that raw material used for construction of stone tools and excavation site are independent. Stone Tool Construction Material Material Site B Row Total Basalt 768 547 1315 Obsidian 101 94 195 Pedernal chert Other Column Total 536 499 1035 179 1496 1228 2724 (a) What is the level of significance? State the null and alternate hypotheses. O Ho: Stone tool material and site are independent. H: Stone tool material and site are not independent. O Ho: Stone tool material and site are not independent. H: Stone tool material and site are independent. O Ho: Stone tool material and site are independent. H: Stone tool material and…
Need C and D
The success of an airline depends heavily on its ability to provide a pleasant customer experience. One dimension of customer service on which airlines compete is on-time arrival. The file LateFlights contains a sample of data from delayed flights showing the number of minutes each delayed flight was late for two different airlines, Delta and Southwest. Click on the datafile logo to reference the data. DATA file Southwest 120 29 67 89 115 a. Formulate the hypotheses that can be used to test for a difference between the population mean minutes late for delayed flights by these two airlines. 141 = population mean minutes late for delayed Delta flights 142 = population mean minutes late for delayed Southwest flights Ho 141 142 : Delta 113 36 113 82 26 - Select your answer - 0 Southwest 49 56 31 110 141 df = p-value = We - Select your answer-reject Ho. Delta 142 7 39 90 94 (rounded to 2 decimals) (rounded to 2 decimals) Southwest 66 131 125 26 31 H₂H₂ - Select your answer - 0 b. What is…
A research group is conducting an experiment to study the relationship between fitness levels and the number of hours spent exercising each week. Subjects are randomly selected and, after several fitness tests, are assigned a fitness score. The number of hours spent exercising per week is also recorded. Data for 15 subjects are given below. Subject Hours of Exercise per Week Fitness Score 1 1 3 2 1.5 4.7 3 1.75 6 4 2 5 5 2 6.5 6 4.5 14.2 7 2.5 13.5 8 3.25 15 9 3 13.4 10 3.75 14 11 3.5 10 12 4 10 13 2.5 12 14 5.25 14.5 15 5 15 Create a bar graph in MicrosoftÂ® ExcelÂ® using the data. Label the graph and include the source of the data. Construct an equation in two variables that models this relationship. This equation may be linear, polynomial, rational, square root, or variation? Is the equation an exact model or an approximate model of the relationship between the variables? Explain your reasoning. Use the equation to make a prediction of the likely value of the…
Do men and women have similar favorite foods? A survey asked a group of college students about their favorite foods. It also grouped the students by their gender. The researchers want to determine if the distribution of favorite foods is the same for men and women. The data is recorded in the contingency table below, and a chi-square Homogeneity Test at the 5% significance level is performed. Sushi Pizza Hamburgers Row Total Men 19 19 16 54 Women 12 24 26 62 Column Total 31 43 42 116 The null and alternative hypotheses are: H0: The distributions of the two populations are the same. Ha: The distributions of the two populations are not the same. Compute the test statistic, rounded to one decimal place. Provide your answer below: test statistic =
Is there a relationship between self-reported major and self-reported IQ in the sample? a. Write a null and an alternative hypothesis for this research MajorBiologyBiologyBiologyBiologyBiologyBiologyBiologyBiologyBiologyBiologyBiologyBiologyBiologyBiologyBiologyBiologyBiologyBiologyBiologyBiologyMedical ImagingMedical ImagingNursingNursingNursingNursingPhilosophyPsychologyPsychologyPsychologyBioinformaticsBiologyBiologyBiologyBiologyBiologyBiologyBiologyBiologyIntegrated Science StudiesNursingNursingNursingNursingNursingPsychologyPsychologyPsychologyPsychologyPsychologyPsychologyPsychologyPsychologyPsychologyPsychologyPsychologyPsychologySocial ScienceSocial WorkSocial Work IQ 115 110 113 125 105 120 107 114 115 106 124 110 120 110 135 95 138 102 124 119 110 130 115 120 110 117 121 115 103 127 116 120 117 111 115 106 135 138 102 100 113 125 105 110 120 106 109 100 130 123 107…

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