Hw8: Chi-Square Test PracticeWe collect a sample of 100 people and observe the following:MajorHumanitiesSciencesBusinesstotalPublic2035560HighSchoolPrivate 10151540total3050100Test the hypothesis that school type and subsequent major are not independent20

Name: Hw8: Chi-Square Test PracticeWe collect a sample of 100 people and ob
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Description: Hw8: Chi-Square Test PracticeWe collect a sample of 100 people and observe the following:MajorHumanitiesSciencesBusinesstotalPublic2035560HighSchoolPrivate 10151540total3050100Test the hypothesis that school type and subsequent major are not indepen

Given information: Sample size n=100 The observed values are presented in the following table:…

Math

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Hw8: Chi-Square Test Practice We collect a sample of 100 people and observe the following: Major Humanities Sciences Business total High Public 20 35 5 60 School Private 10 15 15 40 total 30 50 20 100 Test the hypothesis that school type and subsequent major are not independent

Hw8: Chi-Square Test Practice We collect a sample of 100 people and observe the following: Major Humanities Sciences Business total High Public 20 35 5 60 School Private 10 15 15 40 total 30 50 20 100 Test the hypothesis that school type and subsequent major are not independent

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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A. Headache Pain : There are many over-the-counter pain relievers. By the end of the semester, you have a tremendous headache and are looking for the most effective pain relief available. You conduct a study comparing the three most popular pain relievers and a placebo to see which work best. You use only subjects with headaches and record the amount of time (in minutes) it takes for their headache to go away after they receive the medication. You randomly assign 60 participants to one of the four conditions using a double- + blind procedure. (Use a = Placebo 70 Drug A 30 Drug B 10 Drug C 10 30 60 40 20 50 40 10 10 60 30 40 10 10 40 30 30 30 30 30 10 40 20 20 20 60 40 20 30 50 30 30 10 30 30 20 20 60 20 10 10 20 40 20 30 20 50 20 10 40 20 30 30 State the hypotheses Critical value and df Test statistic
A. Headache Pain : There are many over-the-counter pain relievers. By the end of the semester, you have a tremendous headache and are looking for the most effective pain relief available. You conduct a study comparing the three most popular pain relievers and a placebo to see which work best. You use only subjects with headaches and record the amount of time (in minutes) it takes for their headache to go away after they receive the medication. You randomly assign 60 participants to one of the four conditions using a double- blind procedure. (Use a = .05) Drug A Drug C 10 Placebo Drug B 10 70 30 30 60 40 20 50 40 10 10 60 30 10 10 40 40 30 30 30 30 30 10 40 20 20 20 60 40 20 30 50 30 30 10 30 30 20 20 60 20 10 10 20 40 30 20 50 20 20 10 40 20 30 30 IV (or predictor) variable DV (or criterion) variable What type of analysis should you conduct to determine which method relieves headache pain most swiftly?
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Do people in different political parties use similar modes of transportation? Researchers ask a group of people about how they get to work. They also group the people by their political party. They want to determine if the distribution of transportation is the same for democrats and republicans. The data are recorded in the contingency table below, and a chi-square Homogeneity Test at the 1% significance level is performed. Car Public Transit Walk Row Total Democrats 21 16 6 43 Republicans 8 25 16 49 Column Total 29 41 22 92 Select the correct null and alternative hypotheses for this test. Select all that apply: H0: The distribution of the two populations are the same. Ha: The distribution of the two populations are not the same. H0: The distribution of the two populations are not the same. Ha: The distribution of the two populations are the same.
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In southern California, a growing number of persons pursuing a teaching credential are choosing paid internships over traditional student teaching programs. A group of fifteen candidates for three teaching positions consisted of seven paid interns and eight traditional student teachers. Assume that all fifteen candidates are equally qualified for the three positions, and that x represents the number of paid interns who are hired. (a) Does x have a binomial distribution or a hypergeometric distribution? Support your answer. (Round your answer to four decimal places.) binomial hypergeometric (b) Find the probability that three paid interns are hired for these positions. (Round your answer to four decimal places.) X (c) What is the probability that none of the three hired was a paid intern? (Round your answer to four decimal places.) 0.1231 (d) Find P(x ≤ 1). X
QUESTION 9 A random sample of size n-7 is drawn from normal population and is listed below, 5460, 5900, 6090, 6310, 7160, 8440, 9930, Then the Maximum error at a =0.05 is O 562.9 O 1028.6 O 12541.6 O 1489.3
Political parties want to know what groups of people support them. The General Social Survey (GSS) asked its 2014 sample, "Generally speaking, do you usually think of yourself as a Republican, Democrat, Independent, or what?" The GSS is essentially an SRS of American adults. The large two‑way table provided breaks down the responses by the highest degree the subject held. None High School Jr. College Bachelor Graduate Strong Democrat 53 198 23 81 64 Not strong Democrat 52 204 31 70 49 Independent, near Democrat 40 163 26 66 42 Independent 118 251 36 67 30 Independent, near Republican 24 136 19 45 2525 Not strong Republican 19 142 30 71 30 Strong Republican 18 131 15 53 28 Other party 5 31 3 15 8 Use the four‑step process and the full table of counts to analyze the differences in political party support among levels of education. The sample is so large that the differences are bound to be highly significant, but provide the chi‑square statistic and its P‑value…
▾ Part 1 of 4 A pharmaceutical company claims their new diabetes medication results in less variance in a patient's glucose level than if the patient were on no medication at all. An endocrinologist wishes to test this claim. She divides participants randomly into two groups. Group A consists of 20 diabetics who received the medication; group B consists of 26 diabetics who received a placebo. After two weeks, the blood sugar level of each patient in each group was measured with the following results (in mg/dL): Group A: 77.8, 229.4, 199.9, 110.1, 180.2, 116.1, 139.7, 171.1, 37.4, 158.1, 88.4, 195.5, 246.1, 142.4, 178.1, 105.5, 179.6, 146.1, 78.8, 123.7 Group B: 124.5, 130.1, 136, 162.8, 113.4, 72.8, 142.6, 50.3, 179.8, 197, 230, 194.3, 171, 109.3, 114.4, 107.5, 114.7, 195.3, 127.7, 126.4, 85.6, 166.7, 182.3, 113.5, 216.7, 162.8 Perform a hypothesis test using a 6% level of significance to test the pharmaceutical company's claim. Step 1: State the null and alternative hypotheses. Ho:…
1. A developmental psychologist would also like to determine how much fine motor skill improves for children from age 3 to age 4 but is worried about practice effects. She takes a random sample of 9 three-year old children and a second sample of 9 four-year olds and measures fine motor skill in each using the same test described above. Her data are provided below. Three Year Olds: 40, 35, 38, 39, 40, 50, 40, 38, 42 Four Year Olds: 35, 36, 39, 29, 35, 34, 33, 34, 35 a. Is there a significant difference in the motor skills from age three to four? Test with an α = 0.01. b. What type of error is possible based on the outcome? c. Calculate and interpret the effect size. d. What is the mean motor skill score for the age three children? What is the mean motor skill score for the age four children?