Statistics Review

856 words - 4 pages

Math 221 **** Example Format ****
Week 6 Lab

Submitted by: (Insert Name)

Part 1. Normal Distributions and Birth Weights in America

1(a) 37 to 39 weeks as mean is around 7.33 lb.
1(b) 40 weeks as mean is around 7.72 lb.
1(c) 28 to 31 weeks as mean is 4.07 lb.

2(a) 99.88%, Excel command used was NORMDIST(5.5,1.88,1.19,TRUE).
2(b) 43.83%
2(c) 4.66%
2(d) 2.75%

3(a) Above 8.7269, Excel command used was NORMINV(0.9,7.33,1.09).
3(b) Above 9.0853

4(a) 41.41%, Excel command used was NORMDIST(9,5.73,1.48,TRUE)-NORMDIST(6,5.73,1.48,TRUE).
4(b) 82.61%
4(c) 81.56%

5(a) 88.36%, Excel command used was ...view middle of the document...

Finding z- and t-scores for Confidence Intervals

1. Using Excel, find the z-score that corresponds to the following Confidence Levels:

a. 80%
Answer: 1.282

b. 85%
Answer: 1.44

c. 92%
Answer: 1.751

d. 97%
Answer: 2.17

2. Using Excel, find the t-score that corresponds to the following Confidence Levels and Sample Sizes:

a. 95% with n = 25
Answer: 2.064

b. 96% with n = 15
Answer: 2.264

c. 97% with n = 21
Answer: 2.336

d. 91% with n = 10
Answer: 1.899

3. Suppose we wish to estimate the population mean using a confidence interval. When is it appropriate to use a z-score? When is it appropriate to use a t-score?

When our sample size is 30 or larger then distribution of sample means is normal
then we can use z-score.

When our sample size is less than 30 and we assume that the population is normal or approximately normal, if population standard deviation is unknown, we should use t-score but if population standard deviation is known we can use z-score.

Part 4. Bob’s Candies

1. Find the sample mean and sample standard deviation of the amount citizens spend per year.
Sample mean = 78.4
Sample standard deviation = 6.21

2. When finding a confidence interval for the true mean spent...

Other Papers Like Statistics Review

Business Communication Essay

881 words - 4 pages Lesson 2: Review of basic concepts of probability theory Coverage: Basic probability rules Random variables and associate concepts Normal distributions Reading: Chapter 2 (1-7), Chapter 3 (1-5, 10-11) and Chapter 4 (1-8) (1 8) Homework: Replicate and complete all the classroom exercises. Print answers of 2.1 (b-c-d), 2.3 (b-c-d) and 2.4(b-c-d) in one (1) page. 1 Business Statistics Lesson 2 - Page 2 Objectives At the end of

Use Of Statistical Information Essay

1115 words - 5 pages , possible increasing the monitoring of hand hygiene compliance and isolation review are just a few interventions utilized to specifically identify problem areas. The term descriptive statistics is given to analysis of data which helps to describe, show, or summarize data in the meaningful way so that patterns may emerge from the data making it easier to visualize the information (Lund Research, 2013). Two types of statistics which are used

Article Rebuttal

751 words - 4 pages statistical claims on gun related deaths among youth, as well, debunk the implication “guns kill”. First, let’s place a level of perspective on the statistical claims presented in the article in question. According to the National Center for Health Statistics, National MCH Center for Child Death Review and Centers for Disease Control and Prevention (National MCH Center for Child Death Review, 2007) (Centers for Disease Control and Prevention, 2013

Quantitative Techniques

644 words - 3 pages THE QUANTITATIVE RESEARCH APPROACH Chapter 2 RESEARCH STEPS WITHIN THE QUANTITATIVE APPROACH • Step 1: Identify a Problem Area • Step 2 & 3: Review & Evaluate Literature • Step 4 & 5: Be aware of ethical & cultural issues • Step 6: State Research Question or hypothesis • Step 7 & 8: Select research approach & decide measures • Step 9 & 10: Select a Sample & Data Collection Method THE QUANTITATIVE APPROACH (Continued) • Step 11

Qnt351+Syllabus+Spring+2014 (3)

2671 words - 11 pages that could be answered by the data.Discuss how the findings might help with business decision making.Format your citations consistent with APA guidelines. | Apr 28 | | Nongraded Activities and Preparation MyStatLab® Orientation | Review the MyStatLab® Student Instructions PowerPoint® presentation. Log on to MyStatLab®.Complete the MyStatLab® Orientation exercise. | Apr 28 | | Individual Statistics in Business | Write a 300

Website Review Table

547 words - 3 pages University of Phoenix Material Website Review Find national, state, and local governmental health agency websites that address the issue you selected in your Week One assignment. Follow the example to document your findings in the table. Health issue: ____Obesity_______________________ |Website |Website Information Type |Type of Surveillance: |Data

Statistics

3466 words - 14 pages descriptive statistics. Students will learn to apply business research and descriptive statistics in making better business decisions. Other topics include examination of the role of statistics in research, statistical terminology, the appropriate use of statistical techniques, and interpretation of statistical findings in business and research. Policies Faculty and students will be held responsible for understanding and adhering to all

Marketing

619 words - 3 pages Research -Harvard style of referencing -Forms of in-text referencing -End text referencing -Issues of plagiarism 5. Critically reviewing the literature -Literature sources available -Planning the literature search -Use of relevance trees in literature review -The process of literature review 6. Deciding on the research approach and choosing a research strategy -Differing approaches to research

Taking It to the Net

603 words - 3 pages affected the employment trends. Statistics will also be shared showing the change in GDP and the different employment trends. The consumer price index over the last four years will also be examined to measure the pace of inflation. Keywords: gross domestic product (GDP), employment trends, inflation, consumer price index (CPI)   Taking it to the Net So how do you forecast a company’s sales for the next two years? What kind of data do you

Juvenile Crime Statistics

1444 words - 6 pages Running head: JUVENILE CRIME STATISTICS PAPER 1 Juvenile Crime Statistics Paper CJA/374 JUVENILE CRIME STATISTICS PAPER 2 Juvenile Crime Statistics Paper Introduction Juvenile crime statistics is truly misunderstood by today’s society. The general public pushes for harsher punishment when in reality juvenile crime rate has actually decreased. This paper will summarize the “Juvenile Arrests 2008”. This paper will further discuss

Regression I4

912 words - 4 pages  Regression I4 Tiffany Carter QNT 275 August 31, 2015 Dr. Stephen Loro TABLE OF CONTENTS I. INTRODUCTION 3 Research Problem 3 Purpose of Study 3 Research Question 3 Null and Alternative Hypothesis 3 Alpha Level of Significance 4 Variable Definitions 4 Limitations 4 II. REVIEW OF RELATED LITERATURE 4 Background 4 III. METHODOLOGY 5 Research Design 5 Data Collection 5 Data 5 Descriptive Statistics

Related Essays

Statistics Essay

578 words - 3 pages be monitoring inventory. The statistics will show how much a product was used and how much is on hand, letting you know to order another shipment or not. Statistics can be used to determine how much a average customer spends in a store. Statistics can also be used to to determine a company's future. During a annual review, statistics will show if the company is making money or loosing money. If the sales statistics are on the downfall, the company

Understanding Business Research Terms And Concepts Part 2

1675 words - 7 pages certainty of the results of some inferential statistics. References , Copyright 2015 Qualitative Research Consultants Assocation (2012) what is Qualitive Research http://www.qrca.org/?page=whatisqualresearchInternational Small Business Journal: Invited review Babbie, Earl R. The Practice of Social Research. 2015 USC Quantitive Research http://libguides.usc.edu/c.php?g=235034&p=1561756

Journal Article Critique Essay

1121 words - 5 pages  Journal Article Critique BSHS/435 September 8, 2011 Journal Article Critique Jang, Sung Joon did an analysis and review of a type of study.  In this study Jang reported that the study towards Sampson and Laub's the statistics of instable adolescence is influenced nationally by underage drinking. Statistics also show that the behavior of binge drinking between adolescence and emerging adulthood is highly influenced (Jang, S

Basic Concepts In Statistics Essay

1100 words - 5 pages procedure it draws a conclusion within a research study as well as beyond a study due to the scores. In contrast, statistics makes it possible for researchers to show data clearly and precisely, and this would allow another researcher to review as well as understand another researcher’s work that was done. Additionally, statistics are very crucial because in research it lets a researcher to help in finding out weather their findings were right or