Problem 421. In an attempt to compare the durability of two different materials (X and Y), 10.pleces of type X and 14 pieces of type Y were used. From these samples wecalculate the statistics: X = 129.44, y =122.65, sx = 9.15, sy = 11.02. The pooledestimate of the standard devlation, sp., in the two-sample test statistic is:106.0110.28105 7210.30

In order to compare the durability of two different materials (X and Y), conduct a two-mean…

Answered: 21. In an attempt to compare the…

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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Problem 2:Examine the relationship between amount of time spent studying for an exam (X) in hours andthe score that person makes on an exam (Y)X Y2 653 703 754 705 856 857 90 using spss Give the following:1. Null hypothesis2. Alternative hypothesis3. Statistical test4. Computation5. Decision6. Conclusion
Problem 10.6. Does the rate of voter turnout vary significantly by the type of election? A random sample of voting precincts displays the following pattern of voter turnout by election type. Assess the results for significance To know which groups are different from one another, we need to examine the results from the post hoc test analysis. Not all of what you get needs to be examined. Discuss final results using APA format. In addition to referring to information from the previous two tables,
Problem 6: Please answer parts a and b! (a) A genetic model suggests that 80% of plants grown from a cross between two given strains of seeds will be of the dwarf variety. After breeding 201 of these plants, 153 were observed to be of the dwarf variety. Do these data strongly contradict the genetic model? Find the p-value. (b) At the 1% significance level, what is the conclusion of the above hypothesis test?
Problem 10.5. Are sexually active teenagers any better informed about AIDS and other potential health problems related to sex than teenagers who are sexually inactive? A 15-item test of general knowledge about sex and health was administered to random samples of teens who are sexually inactive, teens who are sexually active but with only a single partner, and teens who are sexually active with more than one partner. Is there any significant difference on the test scores? To know which groups are different from one another, we need to examine the results from the post hoc test analysis. Not all of what you get needs to be examined. Discuss final results using APA format. In addition to referring to information from the previous two tables
Question 8 Researchers compared the number of chocolate chips in Keebler brand vs. store brand cookies. Number of chocolate chips for keelber and number of cholcalte chips for store brand Grap with question write step by step soulation Question 9
As part of the study described in Problem 6, investigators wanted to assess the accuracy of self-reported smoking status. Participants are asked whether they currently smoke or not. In addition, laboratory tests are performed on hair samples to determine presence or absence of nicotine. The laboratory assessment is considered the gold standard, or truth about nicotine consumption. The data are as follows: Nicotine Absent Nicotine Present Self-reported nonsmoker 90 17 Self-reported smoker 10 50 What is the specificity of self-reported smoking status? A)1 B)0.1 C)0.84

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