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![solutions IT Taj The appropriate hypothesis are (B) Ho: el = 7 Hall+7 b) Tot statistic - 7.4 7. 192 -7 0.672 128 C L-1 2] cri](http://img.homeworklib.com/questions/4dd34580-1f23-11ea-9f66-993d0081b7c6.png?x-oss-process=image/resize,w_560)
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A random sample of 28 plastic items is obtained, and their breaking strengths are measured. The sample mean is 7.14...
Items 5 through 9 refer to the following: The following data represent the breaking strengths of...
Items 5 through 9 refer to the following: The following data represent the breaking strengths of samples of 20 gauge insulated copper wire from three different suppliers. The researcher is interested in finding evidence that the distribution of breaking strength differs by supplier. Use the .05 significance level and the Kruskal-Wallis test to answer the following questions. Supplier A B C 150 157 143 154 161 147 156 163 151 157 166 154 161 170 156 question 5 Give the value...
A sample mean, sample standard deviation, and sample size are given. Use the one meant test...
A sample mean, sample standard deviation, and sample size are given. Use the one meant test to perform the required hypothesis test about the mean, , of the population from which the sample was drawn. Use the P-value approach. Also, assess the strength of the evidence against the null hypothesis. x-22,298, s=14200, n = 17, HO: P = 30,000, Ha# 30,000 a -0.05. Test statistic: 224. P.value 0.0200. Reject the null hypothesis. There is sufficient evidence to conclude that the...
(16 points) Suppose the breaking strength of plastic bags is a Gaussian random variable Bags from company i have a mean strength of 8 kilograms and a variance of 1 kg2; Bags from company 2 have a...
(16 points) Suppose the breaking strength of plastic bags is a Gaussian random variable Bags from company i have a mean strength of 8 kilograms and a variance of 1 kg2; Bags from company 2 have a mean strength of 9 kilograms and a variance of 0.5 kg' Assume we check the sample mean X1o of the breaking strength of 10 bags, and use X1o to determine whether a batch of bags comes from company 1 (null hypothesis Ho) or...
The breaking strengths of cables produced by a certain manufacturer have a mean, p, of 1750...
The breaking strengths of cables produced by a certain manufacturer have a mean, p, of 1750 pounds, and a standard deviation of 100 pounds. It is claimed that an improvement in the manufacturing process has increased the mean breaking strength. To evaluate this claim, 150 newly manufactured cables are randomly chosen and tested, and their mean breaking strength is found to be 1760 pounds. Can we support, at the 0.05 level of significance, the claim that the mean breaking strength...
answer neatly and correctly please! The breaking strengths of cables produced by a certain manufacturer have...
answer neatly and correctly
please!
The breaking strengths of cables produced by a certain manufacturer have a mean, u, of 1850 pounds, and a standard deviation of 55 pounds. It is claimed that an improvement in the manufacturing process has increased the mean breaking strength. To evaluate this claim, 70 newly manufactured cables are randomly chosen and tested, and their mean breaking strength is found to be 1868 pounds. Can we support, at the 0.01 level of significance, the claim...
For a random sample of 36 data pairs, the sample mean of the differences was 0.72....
For a random sample of 36 data pairs, the sample mean of the differences was 0.72. The sample standard deviation of the differences was 2. At the 5% level of significance, test the claim that the population mean of the differences is different from 0. (a) Is it appropriate to use a Student's t distribution for the sample test statistic? Explain. No, the sample size is not larger than 30. Yes, the sample size is larger than 30. No, the...
A random sample of 49 measurements from a population with population standard deviation o 3 had...
A random sample of 49 measurements from a population with population standard deviation o 3 had a sample mean of x, 9. An independeent random sample of sample mean of x, 11. Test the claim that the population means are 64 measurements from a second population with population standard deviation a2 4 had different. Use level of significance 0.01. (a) What distribution does the sample test statistic follow? Explain. The student's t. We assume that both population distributions are approximately...
A random sample of 16 values is drawn from a mound-shaped and symmetric distribution. The sample...
A random sample of 16 values is drawn from a mound-shaped and symmetric distribution. The sample mean is 15 and the sample standard deviation is 2. Use a level of significance of 0.05 to conduct a two-tailed test of the claim that the population mean is 14.5. (a) Is it appropriate to use a Student's t distribution? Explain. Yes, because the x distribution is mound-shaped and symmetric and σ is unknown.No, the x distribution is skewed left. No, the x distribution...
Assume that a simple random sample has been selected and test the given claim. Use the...
Assume that a simple random sample has been selected and test the given claim. Use the P-value method for testing hypotheses. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. The ages of actresses when they won an acting award is summarized by the statistics n=84, x= 35.9 years, and s = 11.8 years. Use a 0.01 significance level to test the claim that the mean age of actresses when...
4 ח Test the claim about the population mean, i, at the given level of significance...
4
ח Test the claim about the population mean, i, at the given level of significance using the given sample statistics. Claim: = 30; a =0.04; 0 = 3.52. Sample statistics: X = 292, n=53 Identify the null and alternative hypotheses. Choose the correct answer below. O A. Ho u = 30 He: > 30 oc. Họ H= 30 H< 30 OE. HO = 30 Hy #30 OB. Ho * 30 H = 30 OD. H: > 30 H, =...
A sample mean, sample standard deviation, and sample size are given. Use the one meant test to perform the required hypothesis test about the mean, , of the population from which the sample was drawn. Use the P-value approach. Also, assess the strength of the evidence against the null hypothesis. x-22,298, s=14200, n = 17, HO: P = 30,000, Ha# 30,000 a -0.05. Test statistic: 224. P.value 0.0200. Reject the null hypothesis. There is sufficient evidence to conclude that the...
(16 points) Suppose the breaking strength of plastic bags is a Gaussian random variable Bags from company i have a mean strength of 8 kilograms and a variance of 1 kg2; Bags from company 2 have a mean strength of 9 kilograms and a variance of 0.5 kg' Assume we check the sample mean X1o of the breaking strength of 10 bags, and use X1o to determine whether a batch of bags comes from company 1 (null hypothesis Ho) or...
The breaking strengths of cables produced by a certain manufacturer have a mean, p, of 1750 pounds, and a standard deviation of 100 pounds. It is claimed that an improvement in the manufacturing process has increased the mean breaking strength. To evaluate this claim, 150 newly manufactured cables are randomly chosen and tested, and their mean breaking strength is found to be 1760 pounds. Can we support, at the 0.05 level of significance, the claim that the mean breaking strength...
answer neatly and correctly
please!
The breaking strengths of cables produced by a certain manufacturer have a mean, u, of 1850 pounds, and a standard deviation of 55 pounds. It is claimed that an improvement in the manufacturing process has increased the mean breaking strength. To evaluate this claim, 70 newly manufactured cables are randomly chosen and tested, and their mean breaking strength is found to be 1868 pounds. Can we support, at the 0.01 level of significance, the claim...
For a random sample of 36 data pairs, the sample mean of the differences was 0.72. The sample standard deviation of the differences was 2. At the 5% level of significance, test the claim that the population mean of the differences is different from 0. (a) Is it appropriate to use a Student's t distribution for the sample test statistic? Explain. No, the sample size is not larger than 30. Yes, the sample size is larger than 30. No, the...
A random sample of 49 measurements from a population with population standard deviation o 3 had a sample mean of x, 9. An independeent random sample of sample mean of x, 11. Test the claim that the population means are 64 measurements from a second population with population standard deviation a2 4 had different. Use level of significance 0.01. (a) What distribution does the sample test statistic follow? Explain. The student's t. We assume that both population distributions are approximately...
Assume that a simple random sample has been selected and test the given claim. Use the P-value method for testing hypotheses. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. The ages of actresses when they won an acting award is summarized by the statistics n=84, x= 35.9 years, and s = 11.8 years. Use a 0.01 significance level to test the claim that the mean age of actresses when...
4
ח Test the claim about the population mean, i, at the given level of significance using the given sample statistics. Claim: = 30; a =0.04; 0 = 3.52. Sample statistics: X = 292, n=53 Identify the null and alternative hypotheses. Choose the correct answer below. O A. Ho u = 30 He: > 30 oc. Họ H= 30 H< 30 OE. HO = 30 Hy #30 OB. Ho * 30 H = 30 OD. H: > 30 H, =...
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