Two types of plastic are suitable for an electronics component manufacturer to use. The breakingstrength of this plastic is important. It is known that o₁ = ₂ = 1.0 psi. From a random samplesize n₁ = 10 and n₂ = 12, you obtain x₁ = 162.5 and ₂ = 155.0. The company will not adoptplastic 1 unless its mean breaking strength exceeds that of plastic 2 by at least 10 psi.Based on the sample information, should the company use plastic 1? Use a = 0.05.

Given Data : For Sample 1 x̄1 = 162.5 σ1 = 1 n1 = 10 For Sample 2 x̄2 = 155…

Answered: Two types of plastic are suitable for…

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 sample of n=16 scores is obtained from a population with u= 50 and o= 16. If the sample mean is M 54, then what is the z-score for the sample mean? Oz=4.00 Oz=1.00 Oz 0.50 Oz=0.25
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A sample of size n = 49 is drawn from a population with standard deviation σ = 4.8. Find the margin of error for a 95% C. I for μ.
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Given a random sample of size n from a uniform population with a = 0, find an estimator for ß by the method of moments.
A sample of n = 16 scores is obtained from a population with μ = 50 and σ = 16. If the sample mean is M = 54, then what is the z-score for the sample mean? a. z = 4.00 c. z = 0.50 b. z = 1.00 d. z = 0.25
Find the standardized test statistic t for a sample with n = 12, x = 15.2, s = 2.2, and α = 0.01 if H0: μ = 14. Round your answer to three decimal places.
A physical therapist wanted to know whether the mean step pulse of men was less than the mean step pulse of women. She randomly selected 54 men and 70 women to participate in the study. Each subject was required to step up and down a 6-inch platform. The pulse of each subject was then recorded. The following results were obtained. Two sample T for Men vs Women N Mean StDev SE Mean Men Women 98% CI for mu Men - mu Women (- 12.20, - 1.00) T-Test mu Men = mu Women (vs H2 O C. Ho: H1 = H2; Ha: H1 #H2 (b) Identify the P-value and state the researcher's conclusion if the level of significance was a = 0.01. What is the P-value? P-value =
1. Teacher Joy conducted a census in her class and she found out that the average time spent for studying is 2.25 hours, average height is 147 cm, and a random sample of 10 students got an average grade of 87%. Which is the statistic?A. 2.25 hoursB. 10 studentsC. 87%D. 147 cm2.. Suppose the null hypothesis states that the mean is less than or equal to 50 kg and the alternative hypothesis states that the mean is greater than 50 kg. Which of the following would commit Type I error?A. Conclude that µ = 50 kg when the truth is µ > 50 kg.B. Conclude that µ > 50 kg when the truth is µ = 50 kg.C. Conclude that µ = 50 kg when the truth is µ < 50 kg.D. Conclude that µ < 50 kg when the truth is µ = 50 kg.3. What variable can the researcher freely manipulate in a study?A. dependent variableB. independent variableC. both the independent and dependent variableD. neither the independent nor the dependent variable
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=72.1σ=72.1. You would like to be 99% confident that your estimate is within 2 of the true population mean. How large of a sample size is required?
Given: σ = 0.9, δ = 3.25 − 3, α = 0.05 , Zα/2 = z0.025 What sample size would be required to detect a true mean, If we wanted the power to be at least 0.85?
Figure 1 shows sample means from samples of size n=100 from a population. Estimate the value of the population parameter and estimate the standard error for the sample statistic. (Please see the picture attached.) μ= SE=

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