User Account

All Pages

Machine needs an adjustment

Assignment Help Basic Statistics
Reference no: EM132184464

Lazurus Steel Corporation produces iron rods that are supposed to be 30 inches long. The machine that makes these rods does not produce each rod exactly 30 inches long. The lengths of the rods vary slightly. It is known that when the machine is working properly, the mean length of the rods made on this machine is 30 inches. The standard deviation of the lengths of all rods produced on this machine is always equal to 0.2 inch. The quality control department takes a sample of 20 such rods every week, calculates the mean length of these rods, and makes a 99% confidence interval for the population mean. If either the upper limit of this confidence interval is greater than 30.10 inches or the lower limit of this confidence interval is less than 29.9 inches, the machine is stopped and adjusted. A recent sample of 20 rods produced a mean length of 30.03 inches. Based on this sample, will you conclude that the machine needs an adjustment? Assume that the lengths of all such rods have a normal distribution.

Round your answers to two decimal places.

The confidence interval is

inches.

Reference no: EM132184464

Questions Cloud

How do you see each of these men viewing the other : HIST1302 : How do other governmental figures seek to challenge their relationship? Ultimately, how do you see each of these men viewing the other?
Estimate for the average monthly residential water : How large a sample should be selected so that the estimate for the average monthly residential water usage in this city is within 95 gallons of the population
Write about the event in the history of the us : Write a paper on the following event that happened in the history of The US.
Determine the sample size needed to obtain : Determine the sample size needed to obtain an estimate of µ if the margin of error E = 0.11, s = 0.95, and the confidence level is 99% (use z0.005 = 2.57).
Machine needs an adjustment : Based on this sample, will you conclude that the machine needs an adjustment? Assume that the lengths of all such rods have a normal distribution.
What other issues are lbj facing internationally : At the beginning of the film, Martin Luther King says, "That's the question isn't it? What Lyndon Johnson really wants."
Implementing and executing organisational strategies : MGT302A - BIZ303 - Strategic Management - Infographic and Presentation Transcript - Describe and evaluate the objectives, aims and the primary aspects
What is the probability that she will be able to complete : What is the probability that she will be able to complete her exam with a working calculator? Does she really gain much by bringing in the backup calculator?
Z-score for the smallest and largest observations : Calculate the z-score for the smallest and largest observations. Is either of these observations unusually large or unusually small?

Reviews

Write a Review

Basic Statistics Questions & Answers

  What is the probability that a transmitted digit

Suppose that 40% of the transmitted digits are 0s. 1. What is the probability that a transmitted digit is correctly received by the satellite?

  Model growth phenomena in biological populations

Question: The logistic equation is commonly used to model growth phenomena in biological populations:

  A sample of 40 women is obtained and their heights in

a sample of 40 women is obtained and their heights in inches and pulse rates in beats per minute are measured. the

  Determine that the study was a randomized experiment

The following are titles of some of the news stories in the Appendix. In each case, determine whether the study was a randomized experiment or an observational.

  Lognormal distribution with a mean problem

Following a lognormal distribution with a mean of 3000 rpm and std deviation of 0.87, what if the boss want a 5% chance of HW failure before selling, how often would I have to replace this hardware ?

  What is the probability that the first ab donor

Question 1. What is the probability that the first AB donor is the 5th person checked? Use 4 decimal places.

  What is the beta of portfolio

Stock X has a beta of .6, stock Y has a beta of 1.4, and stock Z has a beta of 1.2. What is the beta of your portfolio?

  Describing hypothesis testing

In order to determine whether or not a driver's education course improves the scores on a driving exam, a sample of six students were given the exam before and after taking the course. The results are shown below:

  Represents the mean of the control? group

How do I get the formula for the follow if assuming that both populations are normally? distributed, construct a 90?% confidence interval about µ1-µ2.

  Chances that at least one fourth will die before sixty five

A club has twenty members aged twenty. What are the chances that at least one fourth of them will die before their 65th birthdays?

  Determine the probability of each category.

Use this tree diagram and the probability determined in part (a) to calculate the probability that she should receive at least one payment exactly on time.

  In determining the range of an acoustic source by

in determining the range of an acoustic source by triangulation one must accurately measure the time at which the

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd