5. By measuring the amount of time it takes a component of a product to move...

Question

Question

5. By measuring the amount of time it takes a component of a product to move from one workstation to the next, an engineer has estimated that the standard deviation is 8 sec. (a) How many measurements should be made in order to be 95% certain that the maximum error of estimation will not exceed 2 sec? (b) What sample size is required for a maximum error of 4 sec?

math Statistics-And-Probability

Add a comment Improve this question Transcribed image text

Answer 1

Answer #1

a) 2E,eeles,ance 1.960 otandand ewe.de edrusli İK as fulawl b) Gaumpk

Add a comment

Answer 2

Similar Homework Help Questions

5. By measuring the amount of time it takes a component of a product to move...

5. By measuring the amount of time it takes a component of a product to move from one workstation to the next, an engineer has estimated that the standard deviation is 8 sec (a) How many measurements should be m ade in order to be 95% certain that the maximum error of estimation will not exceed 2 sec? (b) What sample size is required for a maximum error of 4 sec?
4. The amount of time T (in hours) that a certain electrical component takes to fail...

4. The amount of time T (in hours) that a certain electrical component takes to fail has an exponential distribution with parameter > 0. The component is found to be working at midnight on a certain day. Let N be the number of full days after this time before the component fails (so if the component fails before midnight the next day, N = 0). (a) What is the probability that the component lasts at least 24 hours? (b) Find...
1) A furniture retailer is studying the amount of time it takes their salespeople to arrange...

1) A furniture retailer is studying the amount of time it takes their salespeople to arrange for delivery. The retailer takes a sample of n = 25 times and computes a sample average of 5.2 minutes and a standard deviation of 2.4 minutes. b) Provide a 95% confidence interval on the standard deviation of the time required to arrange for delivery.

Pizza companies are competitive in the amount of time it takes to deliver the pizza. Is...

Pizza companies are competitive in the amount of time it takes to deliver the pizza. Is there a significant difference in the average time it takes to deliver a pizza between Pizza Hut and Dominos? The following data was collected from a sample of deliveries of both companies; test the hypothesis at a 0.01 level of significance with 10 degrees of freedom(assume unequal variances). Pizza Hut: sample mean = 18.68, sample standard deviation = 1.64, sample size = 5 Dominos:...
Pizza companies are competitive in the amount of time it takes to deliver the pizza. Is...

Pizza companies are competitive in the amount of time it takes to deliver the pizza. Is there a significant difference in the average time it takes to deliver a pizza between Pizza Hut and Dominos? The following data was collected from a sample of deliveries of both companies; test the hypothesis at a 0.01 level of significance with 10 degrees of freedom(assume unequal variances). Pizza Hut: sample mean = 18.68, sample standard deviation = 1.64, sample size = 5 Dominos:...
in order to estimate the mean amount of time computer users spend on the internet each...

in order to estimate the mean amount of time computer users spend on the internet each month, how many computers users must be surveyed in order to be 95% confidence that your sample mean is within 13 minutes of the population mean? Assume that the standard deviation of the population of monthly time spent on the internet is 218 min. What is a major obstacle to getting a good estimate of the population mean? Use technology to find the estimated...

Pizza companies are competitive in the amount of time it takes to deliver the pizza. Is...

Pizza companies are competitive in the amount of time it takes to deliver the pizza. Is there a significant difference in the average time it takes to deliver a pizza between Pizza Hut and Dominos? The following data was collected from a sample of deliveries of both companies; test the hypothesis at a 0.01 level of significance with 10 degrees of freedom(assume unequal variances). Pizza Hut: sample mean = 18.68, sample standard deviation = 1.64, sample size = 5 Dominos:...
A research scientist wants to know how many times per hour a certain strand of bacteria...

A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. He wants to construct the 95 % confidence interval with a maximum error of 0.19 reproductions per hour. Assuming that the mean is 6.4 reproductions and the standard deviation is known to be 1.8, what is the minimum sample size required for the estimate? Round your answer up to the next integer
3. The amount of time it takes to complete a task is normally distributed with a...

3. The amount of time it takes to complete a task is normally distributed with a mean of 34 minutes and a standard deviation of 4 minutes. If I take a sample of 24 people how many of those 24 people on average will take over 37 minutes to do the task?

In order to estimate the mean amount of time computer users spend on the internet each...

In order to estimate the mean amount of time computer users spend on the internet each month, how many computer users must be surveyed in order to be 90% confident that your sample mean is within 11 minutes of the population mean? Assume that the standard deviation of the population of monthly time spent on the internet is 208 min. What is a major obstacle to getting a good estimate of the population mean? Use technology to find the estimated...

5. By measuring the amount of time it takes a component of a product to move...

Homework Answers