Q1: Who is more likely to feel vulnerable after being a victim of a vialent crime? We hypothesize thatblacks are more likely to feel ANGER than whitesFeel angerYesRowTotalRaceNoWhiteAв(fo) 237(fe).Row%(fo) 602(fe).Row%(fo) 839100%BlackDEF(fo) 29(fe).Row%(fo) 123(fe)Row%(fo) 152100%ColumnGTotal(fo) 266(fo) 725(fo) 991STEP 1.Do this calculationWhat did you get?Write the result in theblue box in the cellmarked with the letter(C*G/(C* H)/(F* G)/(F* H)/STEP 2.ABDCellOBSERVEDEXPECTEDOBSERVED FREQUENCY SQUARENOW DIVIDETHE NUMBER INFREQUENCY(THE NUMBERFREQUENCY(THE NUMBERIN THE BLUEBOX IN THE CELLMINUS EXPECTEDTHENUMBER THE PREVIOUSIN THEPREVIOUS EXPECTEDFREQUENCYIN THE CELL)COLUMN BY THECOLUMNFREQUENCY FORTHAT CELL (THEBLUE BOXNUMBER)ADETO GET YOUR CHI-SQUARE, ADD ALL THE NUMBERS IN THE LAST COLUMN >

Solution: The observed frequency table is Feel Anger Row Race No Yes Total White A…

Answered: Q1: Who is mare likely to feel…

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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12. Side effects Even if an experiment is double-blind, the blinding might be compromised if side effects of the treatments differ. For example, suppose researchers at a skin-care company are comparing their new acne treatment against the leading competitor. Fifty subjects are assigned at random to each treatment, and the company's researchers will rate the improvement for each of the 100 subjects. The researchers aren't told which subjects received which treatments, but they know that their new acne treatment causes a slight reddening of the skin. How might this knowledge compromise the blinding? Explain why this is an important consideration in this experiment.
3. Bayesian Inference A cab was involved at night in a hit and run accident. In this town there are only two cab companies, the Blue with 80% of the cabs and the Green company with the remaining 20%. As it happened there was a witness to the accident who identified the hit and run cab as Blue. The case came to trial. An important part of the testimony was a test of the reliability of the eyewitness to identify a cab as being either Blue or Green under the same circumstances as those that existed the night of the accident. The result of these tests was that the witness correctly identified a blue cab as blue 70% of the time and a green cab as green 80% of the time. On the basis of the claim of the eyewitness and the test conducted by the court, what is the probability that the cab involved in the accident was in fact Blue as the witness had claimed?
HW3
a random sample of men and women, 15 left-handed males and 8 left-handed females.86 right-handed males and 114 right handed females. Find (a) the percent of men who are left-handed, (b) the percent of women who are left-handed, (c) What can you conclude the relationship between gender and the prevalence of left-handedness?
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O Question 12 <. A CBS News poll involved a nationwide random sample of 651 adults, asked those adults about their party affiliation (Democrat, Republican or none) and their opinion of how the US economy was changing ("getting better," "getting worse" or "about the same"). The results are shown in the table below. %3D better same worse Republican 38 104 44 Democrat 12 87 137 none 21 90 118 If we randomly select one of the adults who participated in this study, compute: (round to four decimal places) a. P(Republican) = b. P(better) = %3D c. P(better | Republican) = С. %3D d. P(Republican | better) = %3D e. P(Republican and better) Submit Question
Ecologists conducted a study to investigate the potential ecological impact of golf courses. Investigators monitored the reproductive success of bluebirds in birdhouses at nine golf courses and ten similar birdhouses at nongolf sites. Data on nests in birdhouses occupied only by bluebirds are shown in the table. If the proportions of nests occupied is the same for golf and nongolf sites, what would be the expected count of birdhouse with 1 nest in nongolf locations? O nests 1 nest Total 2 or 3 nests Golf 30 42 8 80 Nongolf 40 58 22 120 Total 70 100 30 200 50 b 42 60 d. 58 e 40 O O O O O
trw4
The following test scores are for two classes that took the same test. (The highest possible score on the test was 60.) Class 1 (24 scores): 37, 45, 52, 55, 11, 55, 44, 55, 35, 25, 52, 42, 35, 21, 42, 52, 41, 40, 34, 51, 41, 41, 41, 41 Class 2 (25 scores): 50, 40, 40, 23, 40, 50, 31, 31, 40, 31, 31, 31, 53, 33, 33, 35, 55, 24, 39, 40, 41, 59, 41, 39, 46 Form a back-to-back stem and leaf plot with one stem. Put the leaves for one class on the right side of the stem and the leaves for the other class on the left side. Record the leaves in increasing order from the stem. Leaf (Class 1) Stem Leaf (Class 2) 4 3 1
Example 17: In a sample of 1000 citizens of India, 540 are wheat eaters and the rest are rice eaters. Can we assume that both rice and wheat are equally popular in India at a%. level of significance?
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