The IQ levels of a group of 10 females and a group of 12 males between 18 years old and 34 years old were tested, showing the following results: Female IQ Male IQ 96 10a 8a 96 8a 93 8a 88 101 94 103 85 103 97 96 11a 127 11a 126 12a 94 10a Using a significance level 0.05, perform the 8-step hypothesis test to test the claim that the men IQ level is significantly greater than that of women, using a significance level of 0.05 (a=1)

The IQ levels of a group of 10 females and a group of 12 males between 18 years old and 34 years old were tested, showing the following results: Female IQ Male IQ 96 10a 8a 96 8a 93 8a 88 101 94 103 85 103 97 96 11a 127 11a 126 12a 94 10a Using a significance level 0.05, perform the 8-step hypothesis test to test the claim that the men IQ level is significantly greater than that of women, using a significance level of 0.05 (a=1)

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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For a certain year, a study reports that the percentage of college students using credit cards was 87%. A college dean of student services feels that this is too high for her university, so she randomly selects 225 students and finds that 190 of them use credit cards. At the .01 significance level, is she correct about her university?
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.
A case-control (or retrospective) study was conducted to investigate a relationship between the colors of helmets worn by motorcycle drivers and whether they are injured or killed in a crash. Results are given in the accompanying table. Using a 0.01 significance level, test the claim that injuries are independent of helmet color. Color of Helmet Black 493 Yellow Blue 61 White Red Controls (not injured) Cases (injured or killed) 372 29 167 207 109 7 71 30 Click here to view the chi-square distribution table. Identify the null and alternative hypotheses. Choose the correct answer below. A. Họ: Injuries and helmet color are independent H1: Injuries and helmet color are dependent O B. Ho: Whether a crash occurs and helmet color are independent H,: Whether a crash occurs and helmet color are dependent O C. Ho: Whether a crash occurs and helmet color are dependent H: Whether a crash occurs and helmet color are independent O D. Ho: Injuries and helmet color are dependent H;: Injuries and…
Winning team data were collected for teams in different sports, with the results given in the accompanying table. Use a 0.05 significance level to test the claim that home/visitor wins are independent of the sport. Given that among the four sports included here, baseball is the only sport in which the home team can modify field dimensions to favor its own players, does it appear that baseball teams are effective in using this advantage? Click the icon to view the data table. Determine the null and alternative hypotheses. Choose the correct answer below. A. Ho: Basketball games are more likely to win at home than any other sport. H₁: Basketball games are not more likely to win at home than any other sport. OB. Ho: The home/visitor win is independent of the sport. H₁: The home/visitor win is not independent of the sport. OC. Ho: The home/visitor win is dependent on the sport. H₁: The home/visitor win is not dependent on the sport. OD. Ho: Basketball games are not more likely to win at…
A case-control (or retrospective) study was conducted to investigate a relationship between the colors of helmets worn by motorcycle drivers and whether they are injured or killed in a crash. Results are given in the accompanying table. Using a 0.05 significance level, test the claim that injuries are independent of helmet color. Black; White; Yellow; Red; Blue Controls (not injured) 500; 355; 32; 173; 79 Cases (injured or killed) 220; 115; 9; 71; 38
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K Winning team data were collected for teams in different sports, with the results given in the accompanying table. Use a 0.05 significance level to test the claim that home/visitor wins are independent of the sport. Given that among the four sports included here, baseball is the only sport in which the home team can modify field dimensions to favor its own players, does it appear that baseball teams are effective in using this advantage? Click the icon to view the data table. Determine the null and alternative hypotheses. Choose the correct answer below. OA. Ho: The home/visitor win is independent of the sport. H₁: The home/visitor win is not independent of the sport. OB. Ho: Basketball games are not more likely to win at home than any other sport. H₁: Basketball games are more likely to win at home than any other sport. OC. Ho: The home/visitor win is dependent on the sport. H₁: The home/visitor win is not dependent on the sport. OD. Ho: Basketball games are more likely to win at…
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