Urban legend says that knuckle cracking is bad for you and will eventually lead to osteoarthritis of the hand joints. A retrospective case-control study of individuals who had received an X-ray of the right hand in the past 5 years enrolled 180 subjects with a confirmed diagnosis of hand osteoarthritis and 95 control subjects in the same age group. The study found that 36 subjects with hand osteoarthritis and 25 control subjects were habitual knuckle crackers. Is there good evidence that the proportion of knuckle crackers is greater among individuals with hand osteoarthritis? Does this support the urban legend about knuckle cracking?

Urban legend says that knuckle cracking is bad for you and will eventually lead to osteoarthritis of the hand joints. A retrospective case-control study of individuals who had received an X-ray of the right hand in the past 5 years enrolled 180 subjects with a confirmed diagnosis of hand osteoarthritis and 95 control subjects in the same age group. The study found that 36 subjects with hand osteoarthritis and 25 control subjects were habitual knuckle crackers. Is there good evidence that the proportion of knuckle crackers is greater among individuals with hand osteoarthritis? Does this support the urban legend about knuckle cracking?

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Hypothesis testing will consist of four hypothesis tests which you need to complete. While you will not need to show your work or upload any files, each test will require the following: Type of Test: Null Hypothesis: Alternate Hypothesis: SE: Test Statistic: P-value: Decision: Sentence:
wants to know if it is better for Instructor Pilots to give flight students feedback in the airplane immediately after each maneuver rather than to wait till they are on the ground and debriefing. Six student pilots are selected. Each student receives immediate feedback on half of their flights and receives delayed (after landing) feedback on the other half of their flights. Average scores for the student’s evaluations are listed in the table below. Show work. Student Pilot Score for Immediate Feedback Score for Feedback Received After on the Ground Student Pilot A 4 2 Student Pilot B 3 4 Student Pilot C 5 2 Student Pilot D 3 3 Student Pilot E 5 3 Student Pilot F 5 2 a. Test the hypothesis that the student pilots receive higher evaluations on flights where they received immediate feedback compared to delayed (after landing) feedback. Use α =.05. Use the four steps of hypothesis testing. b. Calculate Omega squared (ώ2)
A researcher designs an intervention to combat anti-Arab oppression. She also designs a questionnaire to measure anti-Arab oppression so she can test the participants' level of anti-Arab oppression before and after the intervention. She tests one version of her questionnaire with 45 statements and a shorter version with 12 statements. In both questionnaires, the participants respond to each statement with a rating on a 5-point Likert scale with 0 equaling "strongly disagree" and 4 equaling "strongly agree." The overall score for each participant is the mean of his or her ratings for the different statements on the questionnaire. Look at the following graphs. Graph I graphs the results from the long version, and Graph II graphs the results from the short version. Graph I Graph II PARTICIPANTS PARTICIPANTS 8 8 7 7 6 6 4 4 3 3 2 1 1 1 2 3 4 2 4 LONG QUESTIONNAIRE SCORE SHORT QUESTIONNAIRE SCORE Complete the following sentences by trusting your eyes to see meaningful differences in the two…
I would like to know if my questions are correctly answered.
Part d, e, f only please
For each scenario below name one categorical and one quantitative used and write the complete answer in the box below. a) 9 randomly selected patients with 4 blood types (A , B, O, AB) were tested for their body temperature. Categorical variable: Quantitative variable: b) 10 faculty members from the Physics, Psychology and Biology department were asked about their annual salary. Categorical variable: Quantitative variable:
Read the scenario below to determine which one of the five areas of construct validity (content, response processes, internal consistency, relationship to other variables and consequences) is of most concern. Researchers developed a new and different exam for admission into graduate school. Researchers constructed a Table of Specifications for the new exam.
I need help with this one please thank you!