In a test of the effectiveness of two antibiotic drugs (Drug 1 and Drug 2) in preventing a bacterialskin infection, test subjects were randomly assigned to three groups. Group 1 was given a placebo,group 2 was given Drug 1 and group 3 was given Drug 2. All the test subjects were then exposed tothe bacterial skin infection. Results are summarized in the table above. Use a chi-square test todetermine if infection with this bacterial skin infection and treatment group are independent at the0.05 level of significance.Treatment GroupRow TotalsPlaceboDrug 1Drug 2Infected804050170Not Infected35252080Column Totals1156570250Provide the following information in your answer:1. State Ho and H (Make sure to translate these in the context of the problem)2. x2 test statistic (Round to three decimal places) andp-value (round to four decimal places)3. Calculate Expected Values (Round to one decimal places) And produce table for the problem.4. Do you reject the Null Hypothesis or fail to reject the null Hypothesis?5. State your conclusion.

A 2× 3 Contigency table is given. By using chi square concept we solve it. Degree of freedom…

Answered: In a test of the effectiveness of two…

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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Suppose a researcher conducted a study examining the effectiveness of font type (OpenDyslexic vs. Times New Roman) on reading comprehension for 20 students with dyslexia. After reading a passage in one of the two fonts, 10 students in each of the two font conditions completed a brief reading comprehension test of 15 questions. The number of correctly answered questions for each student is given in the table below: Complete the following in the context of conducting data analysis/ a. Calculate the average number of correct test questions for each group b. Calculate the standard deviation for each group c. Calculate the median and mode for both groups d. Calculate the interquartile range for each group OpenDyslexic 10 9 11 8 24867 12 14 Times New Roman 6675 & Na 43 4 2 8 9
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The director of student services at Oxnard College is interested in whether women are just as likely to attend orientation as men before they begin their coursework. A random sample of freshmen at Oxnard College were asked what their gender is and whether they attended orientation. The results of the survey are shown below: Data for Gender vs. Orientation Attendance Women Men Yes 440 410 No 238 239 What can be conduded at the a - 0.10 level of significance? For this study, we should use z-test for a population proportion a. The null and alternative hypotheses would be: Ho: Select an answer v Select an answer v Select an answer v (please enter a decimal and note that p1 and ul represent the proportion and mean women and and u2 represent proportion and mean for men.) H: Select an answer v Select an answer v Select an answer v (Please enter a decimal) b. The test statistic ? v (please show your answer to 3 decimal places.) c. The p-value = (Please show your answer to 4 decimal places.) d.…
A study was conducted to determine whether big-city and small-town dwellers differed in their helpfulness to strangers. In this study, the investigators rang the doorbells of strangers living in a large City or small towns in the vicinity. They explained they had misplaced the address of a friend living in the neighbourhood and asked to use the phone. The following data show the number of individuals who admitted or did not admit the strangers (the investigators) into their homes: Helpfulness to strangers Admitted strangers into their home Didnot admit strangers into their home Big city dwellers 60 90 Small town dwellers 70 30 State the dependent and independent variable Is this a directional or non directional
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