Confidence interval is
(4.5834 ,4.6166)
QUESTION 4 (4 marks) A manufacturer of contact lens solution produce a 500ml bottle with tightly...
Question 2 (a)A new engineering software is being developed and claim that it is more than 98% compatible with the existing software. A sample of 200 engineering firms tested the new software and 180 of them agreed with the manufacturer. Test at 5% significance level whether the claim is true. (9 marks) (b) The noise level of a newly designed low noise transistor is normally distributed with mean and standard deviation 0.7 dB. The null hypothesis u-24dB is to be...
The manufacturer of hardness testing equipment uses steel-ball indenters to penetrate metal that is being tested. However, the manufacturer thinks it would be better to use a diamond indenter so that all types of metal can be tested. Because of differences between the two types of indenters, it is suspected that the two methods will produce different hardness readings. The metal specimens to be tested are large enough so that two indentions can be made. Therefore, the manufacturer uses both...
The manufacturer of hardness testing equipment uses stool-ball inderters to penetrate metal that is being tested. However, the manufacturer thinks it would be better to use a diamond indenter so that all types of metal can be tested. Because of differences between the two types of indenters, it is suspected that the two methods will produce different hardness readings. The metal specimens to be tested are large enough so that two Indentions can be made. Therefore, the manufacturer ses both...
solve each part separately Question 2. [3+4=7 Marks) Historical data indicates that the population standard deviation of the process is 7.6. Recent samples of size 20 produce a standard deviation of 70. a) Construct 95% confidence interval for the true population standard deviation. b) frest to determine if the variance has changed using a significance level of 0.05. nited States)
The manufacturer of hardness testing equipment uses steel-ball indenters to penetrate metal that is being tested. However, the manufacturer thinks it would be better to use a diamond indenter so that all types of metal can be tested. Because of differences between the two types of indenters, it is suspected that the two methods will produce different hardness readings. The metal specimens to be tested are large enough so that two indentions can be made. Therefore, the manufacturer uses both...
The manufacturer of hardness testing equipment uses steel-ball indenters to penetrate metal that is being tested. However, the manufacturer thinks it would be better to use a diamond indenter so that all types of metal can be tested. Because of differences between the two types of indenters, it is suspected that the two methods will produce different hardness readings. The metal specimens to be tested are large enough so that two indentions can be made. Therefore, the manufacturer uses both...
The manufacturer of hardress testing equipment uses steel-bal inderters to penetrate metal that is being fested. However, the manufacturer thinks it would be better to use a diamond indenter so that all types of metal can be usted. Because of differences between the two types of indeters, it is suspected that the two methods will produce different hardness readings. The metal specimens to be tested are large enough so that two Indentions can be made. Therefore, the manufacturer uses both...
NOTE: NEED HELP FINDING TWO QUESTIONS FOR LOWER AND UPPER BOUND 1) The manufacturer of hardness testing equipment uses steel-ball indenters to penetrate metal that is being tested. However, the manufacturer thinks it would be better to use a diamond indenter so that all types of metal can be tested. Because of differences between the two types of indenters, it is suspected that the two methods will produce different hardness readings. The metal specimens to be tested are large enough...
Colors Fonts Set as Default Document Formatting Answer the following questions: Question 1. [3+5=8 Marks] Random samples have been selected from two normally distributed populations with equal variances. The following sample data were observed, Samples from population 1 Samples from population 2 a) Find a 90% confidence interval for the difference between two population means. b) Use a significance level of 0.10 for testing the hypothesis 11 HH2 10. (United States) Question 2. [3+4-7 Marks) Historical data indicates that the...