5) since, std dev is known,and test for mean breaking strength
so, 2 sample z test will be used
6)
here, two proportions are being compared , so answer is
2 sample prop Z test
Question 5 1 pts Two types of plastics are suitable for an electronics component manufacturer to...
Q4- Two types of plastic are suitable for use by an electronics component manufacturer. The breaking strength of this plastic is important. It is known that the distribution is normal and a = 02 = 1.0 psi. From a random sample of size n = 10 and n2 = 12, we obtain x1 = 162.5 and X2 = 155. The company will not adopt plastic 1 unless its mean breaking strength exceeds that of plastic 2 by at least 10...
7. Two types of plastic are suitable for use by an electronic calculator manufacturer. The breaking strength of this plastic is important. It is known that σ-σ,-1.0 psi. From random samples of n1-10 and n2-12 we obtain У1-162.5 and у,-155.0. The company will not adopt plastic 1 unless its breaking strength exceeds that of plastic 2 by at least 10 psi. Based on the sample information, should they use plastic !? Set up and test appropriate hypotheses using α= 0.01.
2.25. Two types of plastic are suitable for use by an elec- tronic calculator manufacturer. The breaking strength of this plastic is important. It is known that ( σ,-1.0 psi. From random samples of n,-10 and n2= 12 we obtain yi = 162.5 and y2 155.0. The company will not adopt plastic 1 unless its breaking strength exceeds that of plastic 2 by at least 10 psi. Based on the sample information, should they use plastic 1? In answering this...
Question 3 1 pts Two different types of injection-molding machines are used to form plastic parts. A part is considered defective if it has excessive shrinkage or is discolored. Two random samples, each of size 300, are selected and 15 defective parts are found in the sample from machine 1 and 8 defective parts are found in the sample from machine 2. What type of hypothesis test should you use to determine if both machines produce the same fraction of...
Two different types of injection-molding machines are used to form plastic parts. A part is considered defective if it has excessive shrinkage or is discolored. Two random samples, each of size 300, are selected and 15 defective parts are found in the sample from machine 1 and 8 defective parts are found in the sample from machine 2. What type of hypothesis test should you use to determine if both machines produce the same fraction of defective parts? Group of...
4. Two types of plastic are suitable for use by an electronic calculator manufacturer. The breaking strength of the plastic is important. From random samples of n 10 and n2- 12 batches the respective means were obtained as yı. 152.5 and 2. 153.7. The total sum of square for the data was SSTotal31.865 (a) Complete the following ANOVA table. Source SSdf MSF Treatment Error Total 31.865 (b) Calculate the t statistic for the appropriate two sample t test for checking...
Two types of plastic are suitable for use by an electronic calculator manufacturer. The breaking strength of the plastic is important. From random samples of ni- 10 and n2 12 batches the respective means were obtained as -152.5 and 2 153.7. The total sum of square for the data was SSTotal -31.865. (a) Complete the following ANOVA table. Source SS dfMS F Treatment Error Total 31.865 (b) Calculate the t statistic for the appropriate two sample t test for checking...
4. Two types of plastic are suitable for use by an electronic calculator manufacturer. The breaking strength of the plastic is important. From random samples of n 10 and n2 12 batches the respective means were obtained as n-152.5 and уг.-153.7. The total sum of square for the data was SSrot al-31.865. (a) Complete the following ANOVA table. Source Treatment Error Total SS df MSF 31.865 (b) Calculate the t statistic for the appropriate two sample t test for checking...
Two types of plastic are suitable for use by an electronic calculator manufacturer. The breaking strength of the plastic is important. From random samples of ni- 10 and n2 -12 batches the respective means were obtained as ji. -152.5 and j2.-153.7. The total sum of square for the data was SSTotal 31.865. (a) Complete the following ANOVA table. Source Treatment Error Total SSdf MS F 31.865 (b) Calculate the t statistic for the appropriate two sample t test for checking...
(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...