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- Suppose that there are 4 deaths due to stomach can- cer among workers in a tire plant from 1/1/64 to 12/31/83, while 2.5 are expected based on U.S. mortality rates. Provide a 95% CI for the expected number of deaths from stomach cancer over 20 years among the tire workers. Is the number of cases of stomach cancer excessive?For example, for student ID s1243657, the 4th digital of s1243657 is “3”, therefore variable “A” is “Use interactive activities”; the 5th digital of s1243657 is “6”, therefore variable “B” is “Give a lot of assignments”; the 6th digital of s1243657 is “5”, therefore variable “C” is “Good communication skills. Take student id S12042516 as an example. With the data collected, Dr Tian ran a test to see if there were significant relationships between A, B, C and satisfaction toward e-learning. i ) Suggest the test that should be used and explain your reason. State the independent and dependent variables, underlying null and alternative hypotheses.Suppose now that you have good arguments to say that the association between X andC (the unobserved confounding factor, here IQ at age 3), measured by γCX, is of a similarmagnitude as the association between X and A, measured by γAX — which you can computein your data (since A is observed). Would this new condition (γCX = γAX). Why?
- a researcher claims that 85% of Americans think there are unlikely to contract the zika virus in a random sample of 250 Americans 225 think that they're unlikely to contract the Zika virus. At x=0.05 is there enough evidence to reject the researcher's claim?There are 10 students in a cafeteria. If x denoted the number of males, what are the poasible values of XAn automobile service facility specializing in engine tune-ups knows that 60% of all tune-ups are done on four-cylinder automobiles, 30% on six-cylinder automobiles, and 10% on eight-cylinder automobiles. Let X = the number of cylinders on the next car to be tuned. What is the pmf of X?
- why discontinuous if lhl and rhl are same zeroWe wish to demonstrate that the average time to graduate from Tulane is affected by the students having taken AP calculus in high school. Specially, we wish to demonstrate that students who have taken AP calculus in high school graduate an average of more than 0.25 years sooner than students who have not taken AP calculus in high school. If we let denote the average time to graduate for students who have not taken AP calculus and denotes the average time to graduate for students who have taken AP calculus, then select the appropriate alternative hypothesis.is it p=value is suppose to be 0.0401 not 0.0395 to according z-table of -1.75
- It has been observed that Crenshaw’s students don’t seem to do in well in math. To investigate that, for the 19 students who had Crenshaw in 5th grade, determine whether or not their math scores decreased from 4th to 5th Use α = 0.05. Do the same for the 17 students who had Davis in 5th grade. What can you conclude from these tests? Student 4th Grade Teacher 4th Grade Math 4th Grade LA 5th Grade Teacher 5th Grade Math 5th Grade LA 1 Anderson 580 620 Crenshaw 560 615 2 Anderson 520 600 Crenshaw 510 645 3 Anderson 595 570 Crenshaw 600 575 4 Anderson 720 650 Crenshaw 730 670 5 Anderson 570 620 Crenshaw 570 640 6 Anderson 660 750 Crenshaw 650 780 7 Anderson 545 480 Crenshaw 540 520 8 Anderson 500 550 Crenshaw 510 590 9 Anderson 680 640 Crenshaw 650 670 10 Anderson 580 630 Davis 600 630 11 Anderson 610 580 Davis 600 585 12 Anderson 780 720 Davis 780 700 13 Anderson 540 620 Davis 570 610 14 Anderson 480 630 Davis 520 650 15 Anderson 530 580 Davis 560 580 16…A medical researcher says that less than 77% of adults in a certain country think that healthy children should be required to be vaccinated. In a random sample of 400 adults in that country, 73% think that healthy children should be required to be vaccinated. At α=0.05, is there enough evidence to support the researcher's claim? Complete parts (a) through (e) below.1-ATTCHED