Chapter 9 Hypothesis Testing Case Problem 1: Quality Associates‚ Inc. 1. The hypothesis testing results are shown below: Sample 1 Sample 2 Sample 3 Sample 4 Sample Size 30 30 30 30 Mean 11.959 12.029 11.889 12.081 Standard Deviation 0.220 0.220 0.207 0.206 Level of Significance (alpha) 0.010 0.010 0.010 0.010 Critical Value (lower tail) -2.576 -2.576 -2.576 -2.576 Critical Value (upper tail) 2.576 2.576 2.576 2.576 Hypothesized value 12 12 12 12 Standard Error 0.040
Premium Standard deviation Arithmetic mean Statistics
Business Statistics II: Research Paper Robert Franjieh April 19‚ 2015 Introduction This research paper will be designed to answer a couple questions regarding statistics about the Buena School District school bus data. The questions I will be discussing and answering will be based on maintenance of the school busses. The question prepared is; is it cheaper or more expensive to run Thompson‚ Bluebird‚ or Keiser busses? I will also be addressing another question
Premium Bus Diesel engine
Section 1.1 - Introduction to the Practice of Statistics 1. Explain the difference between a population and a sample. A population is the entire group to be studied and a sample is a portion of the population. 2. Explain the difference between a parameter and a statistic. A statistic is a numerical summary of a sample and a parameter is a numerical summary of a population. 3. What is Descriptive Statistics and how is it used? Descriptive statistics describes the results of a sample without
Premium Sampling Sample
Statistics is defined by Bennett‚ Briggs‚ & Triola (2009)‚ as “the science of collecting‚ organizing‚ and interpreting data” (p. 1). Almost every profession uses statistics in some way to guide in making good decisions based on current research. The nursing profession relies heavily on current research to guide patient care with the integration of evidenced-based practice. Statistics provide valuable information to caregivers to help them understand‚ plan‚ evaluate‚ and improve the quality of patient
Premium Patient Health care Health care provider
QNT351~WK5 Individual Assignment: Real Estate Data DUE SUNDAY‚ MAY 21st Resources: Appendix A1 at the end of Basic Statistics for Business and Economics (See attached Chapters 10 & 13 to answer questions below) QUESTION #1: Answer question 58 in the Data Set Exercises from Ch. 10 of Basic Statistics for Business and Economics. Exercise #58: Refer to the Real Estate data‚ which report information on homes sold in Phoenix‚ Arizona‚ last year. a. A recent article in The Arizona
Premium Real estate Real property Property
Research and Statistics in Psychology Tracy Charles PSY/315 October 14‚ 2012 Jennifer Slothower Research and Statistics in Psychology Psychologist need to adhere to scientific research methods when doing a study “the scientific method requires systematic observation and a willingness to modify understanding based on these observations” (Cloninger et al.‚ 2008). This method involves careful observation and collection of data to rule out theories that are not valid. “Scientific
Premium Scientific method Research
A. What is the mean age of this sample? What is the standard deviation? The mean age is 47.5 years old. The standard deviation is 10.74832 years. http://www.calculator.net/standard-deviation-calculator.html Sample Standard Deviation‚ s: 10.748316881702 Sample Standard Variance‚ s2 115.52631578947 Total Numbers‚ N 20 Sum: 950 Mean (Average): 47.5 Population Standard Deviation‚ σ 10.476163419878 Population Standard Variance‚ σ2 109.75 If it follows the normal distribution The
Premium Standard deviation Arithmetic mean Statistics
Descriptive Statistics Carlos Duran QNT/561 April 28‚ 2015 Steven Marantz Descriptive Statistics Sales (in USD) Central Tendency: Mean = 42.824 dollars Dispersion: Standard Deviation = 9.073 dollars Number: 100 Min/Max: MIN IS $23.00; MAX IS $64.00 Confidence Interval: $1.06 to $44.62 The histogram is present in appendix A; the descriptive statistics are present in appendix B. Age Distribution: State if not normally distributed Central Tendency: Median = 35 years Dispersion:
Premium Standard deviation Normal distribution Median
Introducing Criminology. Academic Session 2011 - 2012 ASSIGNMENT STATEMENT. . “Crime statistics do not accurately reflect the nature and extent of crime in our society.” STUDENT NAME: Richard Irwin STUDENT NUMBER: XXXXXX TUTOR: XXXXXX WORD COUNT: XXXX Excluding Bibliography‚ Appendices and Footnotes) CONTENTS ASSIGNMENT BIBLIOGRAPHY APPENDICIES Crime statistics do not accurately reflect the nature and extent of crime in our society. In order to answer
Premium Crime Police Criminology
Christmas holiday vacation. After secondary research from the National Weather Service (2006)‚ the mean wind speed for the 2004 Christmas holiday vacation is calculated at approximately 6.6 mph and serves as the population mean wind speed in the test statistic. The null and alternate hypotheses are stated: H0:  H1: The result of this hypotheses test will allow the friends to determine if the
Premium Null hypothesis Statistical hypothesis testing Type I and type II errors