Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

The mean length of the small counter balance bar is 43 millimeters. There's concern that the adjustments of machine producing the bars have changed. Test the claim at 0.02 level that there has been no change in mean length. The alternate hypothesis is that there has been the change. Twelve bars (n = 12) were chosen at random and their lengths recorded. The lengths are (in millimeters) 42, 39, 42, 45, 43, 40, 39, 41, 40, 42, 43 and 42. The mean of sample is 41.5 and standard deviation 1.784. Computed t = - 2.913. Has there been the statistically significant change in mean length of the bars?

a. Yes, because the evaluated t lies in the area beyond critical.  

b. No, because the information given isn't complete.

c. No, because the computed t lies in area to the right of -2.913.

d. None of above

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M920759

Have any Question? 


Related Questions in Statistics and Probability

1e model for a simple linear regression

1. Recall the model for a simple linear regression:  where  is Normally distributed with mean 0 and variance , where Cov( ) = 0 for all i, j and Cov(  = 0 for all i,j.A day trader wishes to develop a prediction model for ...

1 an investigator wants to determine if a new program aimed

1. An investigator wants to determine if a new program aimed at reducing the overall number of pregnancies in a highly populated area is effective (reducing average births below 6 per household). In order to carry out th ...

Question discuss the specific innovations of jackson

Question: Discuss the specific innovations of Jackson Pollock, as well as his cultural influences and artists he influenced. Use at least two examples of specific artworks. This question relates to Chapter 28 and 29 in A ...

Imagine that you are interested in the effects of

Imagine that you are interested in the effects of background music on people's performance at work. Design an experiment in which you test the effects of classical music (played at various decibels) on employees job ...

A coffee store owner knows that a customer gets a coffee in

A coffee store owner knows that a customer gets a coffee in 35% of the store's transactions. If we take a random sample of 300 customers, what is the probability that less than 32% of them buy a coffee? (A) 0.1292 (B) 0. ...

What tensions emerged in the southwest that threatened to

What tensions emerged in the Southwest that threatened to lead the United States into a war with Mexico? On what grounds did President James K. Polk ask Congress to declare war on Mexico?

Mrjassica manager of appliances for midtown department

Mr.jassica, Manager of appliances for midtown department store feels that her inventory levels of stoves have been running higher than necessary. Before revising the inventory policy for stoves she records the number sol ...

Searches related to the time of travel from a persons

Searches related to the time of travel from a person's apartment to the bus station follows a uniform distribution over the interval from 20 to 30 minutes. If he/she leaves home at 9:05AM, what is the probability that he ...

The department of education would like to determine if

The Department of Education would like to determine if there are gender differences in the performance of twins on the state mandated mathematics examination. As a result, they have collected data on twelve sets of twins ...

250 -300 wordsexplain the history behind the black soldier

250 -300 words Explain the history behind the Black Soldier of the Civil War In this forum look beyond the book for information on specific units, soldiers and even the reasons for why Lincoln allowed the African America ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen