What is the p value if, in a left tail hypothesis test, Z statistic = -1.86 Round to four decimals
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- 13Are freshmen psychology majors less likely to change their major before they graduate compared to freshmen business majors? 454 of the 687 freshmen psychology majors from a recent study changed their major before they graduated and 439 of the 619 freshmen business majors changed their major before they graduated. What can be concluded at the = 0.05 level of significance? The test statistic z = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.)Self-reported injuries among left- and right-handed people were compared i n a survey of 1896 college students i n British Columbia, Canada. Of the 18 O left- handed students, 93 reported at least one injury. In the same period, 619 of the 1716 right-handed students repor ted at least one injury. Test to compar e the proportions of injured students, left- versus right-handed; state clearly your null and alternative hypotheses and choice of test size. Treatment 707 740 745 652 649 676 699 696 712 708 749 690 Control 669 650 651 627 656 642 698
- Suppose that you wanted to determine if Santa Ana residents have better FICO Scores than the U.S. average of 540. You collect a simple random sample of 1000 Santa Ana residents and find a sample mean of 575. The population standard deviation for all FICO scores is 41. Choose the null and alternative hypothesis for the test. H_o is the null hypothesis H a is the alternative O H_o:u>.540, H_a: u-540 O Ho:u-540, H_a: u540 O Ho:u-.540, H a: u>540 O H_o u540Thumbs-up is a popular and new soft drink company in India. The company wants to test the market for its product. A sample of 500 individuals participated in the taste test and 125 indicated that they like the taste. We would like to test if more than 20% of the population will like the new soft drink. For alpha=95% confidence, test the hypothesis.Does more education lower a person’s level of prejudice? The number of years of education and the score on a prejudice test for ten people is given in the following table. Higher scores on the test indicate more prejudice. Years of Education: 12, 15, 14, 13, 18, 10, 16, 12, 10, 4 Score of Prejudice Test: 1, 6, 2, 3, 2, 4, 1, 5, 5, 10 Conduct a hypothesis test to determine if there is a significant linear correlation between the two variables. If there is a significant linear correlation between the variables, determine the regression equation. There is a significant correlation between the variables and the regression equation is y' = 10.5 - 0.532x There is a significant correlation between the variables and the regression equation is y' = - 0.532 + 10.5x There is not a significant correlation between the variables, so the regression equation should not be determined. There is a significant correlation between the variables and the regression equation is y' = 16.509 - 1.054x
- 36% of canadians are single and 20 % are corona infected whereas 12 % are single and corona infected. Given that a selected individual is married, the probabilty that he/ she is corona infected 0.750 0.125 0.250 0.875To investigate if female executives in a very large fortune 500 company are experiencing pay-discrimination: A researcher samples the incomes of 300 male and 300 female executives from that corporation. 1.) Which statistic would you use to test the income difference between male and female executives? 2.) What additional information do you need to calculate this statistic?The owners of the Armadillo Lumber Company wanted to find out whether pay raises are correlated with employees absences. For each of 10 randomly selected employees, they recorded the amount of the pay raise during the past year (in dollars per hour) and the number of absences during the six months following the raise. Calculate the correlation and test its significance using the 7 hypothesis testing steps you have been taught. Раy Absences raise 8. 4 8. 17 3 4 1 1 3
- A political scientist claims that 38% of first-year college students characterize themselves as being “moderate” or “middle of the road” as far as their political affiliation is concerned. Believing this claimed value is too high, you survey a random sample of 400 first-year college students and find that 120 characterize themselves as being “moderate” or “middle of the road.” Based on this information, what will the test statistic be? Choose the answer below that is closest to what you calculate, and try not to do a lot of rounding until you get to the very end of your calculations. 1. -0.3 2. -1.2 3. -2.6 4. -3.3 5. None of the other answer options are correct because the test statistic should be positive, not negative.0190 F A researcher is interested in whether violent offenders can be taught moral reasoning skills and hopes that these skills might eventually lead to a lesser likelihood for recidivism. He randomly selected a sample of 20 violent offenders. He assigned half to the treatment (moral reasoning skills training) (Mean = 8, SD = 1.41), and the other half to no training (Mean = 4.83, SD = 1.71). Does moral reasoning training increase moral reasoning ability in violent offenders?How do I tell if I have a one-sample t-test or an indepenent-samples t-test in the following situation? I have a group that has received a financial benefit and were chosen to rate their happiness after receiving that benefit. However, all members, those in the sample and those in the total group received the same beneifit. Do I have two groups and need an independent samples t-test or do I have one group measured against the mean?
