R5.33. Lefties and music In an experiment to see if left-andright-handed people have different abilities in music, sub-jects heard a tone and were then asked to identify which ofseveral other tones matched the first. Of 76 right-handedsubjects, 38 were successful in completing this test, comparedwith 33 of 53 lefties. Is this strong evidence of a difference inmusical abilities based on handedness?

Given: Number of right handed people, n1=76 Number of lefties, n2=53 The number of right handed…

Answered: R5.33. Lefties and music In an…

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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Three-circle, red-on-white is one distinctive pattern painted on ceramic vessels of the Anasazi period found at the Wind Mountain archaeological site. At one excavation, a sample of 164 potsherds indicated that 70 were of the three-circle, red-on-white pattern. How many ceramic potsherds must be found and identified if we are to be 95% confident that the sample proportion p̂ of such potsherds is within 5.8% of the population proportion of three-circle, red-on-white patterns found at this excavation site? (Round your answer up to the nearest whole number.)
Part: 2 / 4 Part 3 of 4 (c) Determine whether to reject Ho. (Choose one) Part: 3 / 4 Part 4 of 4 the null hypothesis H. (d) State a conclusion. There (Choose one) X Ś enough evidence to conclude that the method is more accurate for new age music than for pop music. X Ś
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A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 297 people over the age of 55, 75 dream in black and white, and among 310 people under the age of 25, 19 dream in black and white. Use a 0.05 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. Complete parts (a) through (c) below. a. Identify the test statistic. z= 6.51 (Round to two decimal places as needed.) Identify the P-value. P-value = 3.770o (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? The P-value is greater than the significance level of a = 0.05, so fail to reject the null hypothesis. There is insufficient evidence to support the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. b. Test the claim by constructing an appropriate confidence…
Q2. A survey is made asking people that they dinned out in the New Year Eve. Males and female are asked if they remember the name of restaurant that visited in the last new year eve. The reason of the survey to find out if there is a relation between the person's ability to recall and the gender. Use the significance level a = 0.025 to make a hypothesis test. Female Male 52 44 Can Recall Can Not Recall 23 40 APPENDIX G 859 APPENDIX G Values of X for Selected Probabilities fo2t x x²=9.2363 PROBABILITIES (OR AREAS UNDER CHI-SQUARE DISTRIBUTION CURVE ABOVE GIVEN CHI-SQUARE VALUES) 0.95 0.90 0.10 0.05 0.025 0.01 0.005 Values of Chi-Squared 0.995 0.99 0975 of 0.0158 27055 1 0.0000 0.0002 00010 0.0039 0.0158 27055 38415 50239 6.6349 7.8794 2 0.0100 0.0201 0.0506 0.1026 02107 46052 59915 7.3778 9.2104 10.5965 3 0.0717 0.1148 02158 0.3538 0.5844 6.2514 7.8147 9.3484 11.3449 12.8381 4 0.2070 0.2971 0.4844 0.7107 10636 7.7794 9.4877 11.1433 13.2767 14.8602 5 04118 0.5543 08312 1.1455 1.6103…
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Three-circle, red-on-white is one distinctive pattern painted on ceramic vessels of the Anasazi period found at the Wind Mountain archaeological site. At one excavation, a sample of 160potsherds indicated that 70 were of the three-circle, red-on-white pattern. How many ceramic potsherds must be found and identified if we are to be 95% confident that the sample proportion p̂ of such potsherds is within 5.0% of the population proportion of three-circle, red-on-white patterns found at this excavation site? (Round your answer up to the nearest whole number.)
In a memory test, the test subjects are given a large number and are asked to memorize it. Historical records show that 80% of test subjects pass the test. To pass the test, a subject must exactly repeat all the digits in the number after two hours. A random sample of 625 people to take the memory test is going to be chosen. Let p be the proportion of people in the sample who pass the test. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of P. 0 (b) Find the standard deviation of p. 0 (c) Compute an approximation for P(P >0.84), which is the probability that more than 84% of the people in the sample pass the test. Round your answer to four decimal places. 0 X
A study was conducted to see how people reacted to certain facial expressions. A sample group of n=36n=36 was randomly divided into six groups. Each group was assigned to view one picture of a person making a facial expression. Each group saw a different picture, and the different expressions were (1) Surprised (2) Nervous (3) Scared (4) Sad (5) Excited (6) Angry. After viewing the pictures, the subjects were asked to rank the degree of dominance they inferred from the facial expression they saw. (The scale ranged from -10 to 10) The data collected is summarized in the table below. Subject Surprised Nervous Scared Sad Excited Angry 1 −1.5−1.5 0.30.3 −0.0999999999999999−0.0999999999999999 1.91.9 −0.5−0.5 −1.7−1.7 2 1.21.2 −1.6−1.6 −0.3−0.3 −1.3−1.3 1.91.9 −1−1 3 1.11.1 11 0.20.2 0.20.2 −0.6−0.6 1.21.2 4 −2−2 −0.5−0.5 0.70.7 −0.3−0.3 0.60.6 −1.8−1.8 5 −0.9−0.9 −2−2 −1.3−1.3 −1.4−1.4 −1.2−1.2 −0.4−0.4 6 −0.9−0.9 −0.9−0.9 1.11.1 0.90.9 0.50.5 −0.9−0.9 (a) Complete the…
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Several students were tested for reaction times (in thousandths of a second) using their right and left hands. (Each value is the elapsed time between the release of a strip of paper and the instant that it is caught by the subject.) Results from five of the students are included in the graph to the right. Use a 0.10 significance level to test the claim that there is no difference between the reaction times of the right and left hands. 240- Click the icon to view the reaction time data table. 180- 120+ 100 150 200 Right Hand What are the hypotheses for this test? Let ua be the of the right and left hand reaction times. Ho: Hd H1: Hd What is the test statistic? t= (Round to three decimal places as needed.) Identify the critical value(s). Select the correct choice below and fill the answer box within your choice. (Round to three decimal places as needed.) O A. The critical value is t= B. The critical values are t= ± What is the conclusion? There enough evidence to warrant rejection of…

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