2. An instructor wants to know whether there is a significant difference in students' performance if they usedifferent note taking techniques at α = 0.05. Student's exam scores are recorded as belowNot taking note at all(No note)Hand-written56109Typed Note4548837104941106399

1. H0:μ1=μ2=μ3Ha:Atleastonemeanisdifferentfromtheothers. 2. We use the Analysis of Variance…

Answered: 2. An instructor wants to know whether…

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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3. A psychology professor wants to know if stress in his statistics class is in anyway affected by a student's major and gender. Test to see if a students and major affects their stress level in the statistics course. Psychology Nursing Other 12 16 21 16 14 7 17 18 Male 12 15 22 8 15 23 9 17 18 EX? = 11275 16 20 23 10 17 28 7 21 28 Female 13 16 27 2 21 23 8 17 29 Critical Value=F(A) 3.32, F(B)4.17, F(AB) 3.32 Solve for the appropriate test statistic(s). Fill out a completed ANOVA Table on the answer sheet
The value of Fcalc increases as A. variability due to chance decreases B. variability due to chance increases C. as the number of observations in each group decreases D. cannot be determined since F is fixed
4.- For the following data set 10, 7, 6, k, 4, 7, 1, 10. Find the value of k so that (a) X = 6.25 (b) X = 7.5 Villalobos 2020 22 (c) M = 7 (d) MR = 10 CHAPTER 3. DATA DESCRIPTION
A sample of 10 students took a class designed to improve their SAT math scores. Following are their scores before and after the class. Can you conclude that the mean increase in scores is greater than 15 points? Let m1 represent the mean score after the class and md=m1-m2. Use the a=0.05 level and the p-value method with the TI-84 Plus calculator. before is 447,440, 439, 435, 451, 453, 491, 526, 473, 440. after is 482, 479, 451, 431, 454, 463, 511, 529, 493, 466.
Suppose that three drugs used to reduce cholesterol are compared in a randomized experiment in which three people use each drug for a month. The data for the reductions in cholesterol level for the N = 9 participants follow. Drug 1 Drug 2 Drug 3 6 10 4 14 12 2 9 6 Calculate the F-statistic for comparing the mean cholesterol reductions for the three drugs. What is the value of F? (report to 2 decimal places) What are the degrees of freedom for this statistic - Between df? ,Within df?
5. The table below shows the distribution of marks scored by 500 students in their oral test in Music. Compute the 3 quartiles. Number of Students Scores (x) 91 100 81 – 90 17 71-80 63 61- 70 65 51 - 60 86 41- 50 112 31-40 68 21-30 55 11-20 17 1-10 8.
16% of all Americans suffer from sleep apnea. A researcher suspects that a different percentage of those who live in the inner city have sleep apnea. Of the 337 people from the inner city surveyed, 47 of them suffered from sleep apnea. What can be concluded at the level of significance of α= 0.05? a. The test statistic= (please show your answer to 3 decimal places.) b. The p-value = (Please show your answer to 4 decimal places.)
Search and Rescue of DND provides various statistics on boating accidents in he Maritimes and B.C. These statistics include information on the wind speed at the time of the accident. The following chart includes information recorded for 184 accidents on both coasts for the same time period: Wind Conditions Accidents West Coast Accidents East Coast Nil 13 6 Light 74 42 Moderate 30 15 Strong or higher 3 1 a) Suppose xe indicates the wind conditions in the East Coast where xe=0 indicates Nil, xe=1 indicates Light, xe = 2 indicates moderate and xe = 3 indicates Strong or Storm. Also suppose that xw indicates the wind conditions on the West Coast and xt indicates…
Q1. A psychologist conducted a study on the relationship between introversion and shyness. The values are results for scales of introversion and shyness. High positive scores on each scale indicate high introversion or shyness; and high negative scores indicate low introversion or shyness. Data collected from 10 people as follows: Introversion 4 -7 -1 0 6 7 -4 -9 -5 8 Shyness 11 -7 -1 -3 0 7 -1 -8 -1 5 a) Compute the correlation coefficient relating introversion and shyness scores. b) Find the regression equation which predicts introversion from shyness. c) What introversion score would you predict from a shyness score of 7?
1.A chi-square test for independence is being used to evaluate the relationship between two variables, one of which is classified into 2 categories and the second of which is classified into 4 categories. What is the df value for the chi-square statistic? a. df = 2 b. df = 6 c. df = 7 d. df = 3

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