StudyXY
RegisterLog in

MM207 Unit 6: Confidence Intervals for Means and Population Proportions

Discusses confidence intervals and their application in statistics.

Hannah Perez
Contributor
4.9
55
5 months ago
Preview (2 of 2 Pages)
100%
Purchase to unlock

Page 1

MM207 Unit 6: Confidence Intervals for Means and Population Proportions - Page 1 preview image

Loading page image...

MM207 Unit 6 Chapter 6 ProjectROBYN GALINDO1MM207 Unit 6: Confidence Intervals for Means and PopulationProportionsTotal points are40. Points are included with each problem.Included with each section or problem are reference examples and end of sectionexercises that can be used as a guide.Be sure to show your work incase partialcredit is awarded.To receive full credit, work must be shown if applicable.Section 6.1: Confidence Intervals for the Mean (Large Samples)1.Find the critical value zcnecessary to form a confidence interval at the givenlevel of confidence.(References: definition for level of confidencepage311, end of section exercises5–8 page 317)(2.5points each)a.90%½ (1-.90) =0.05 = 1.645b.80%½ (1-.80) = 0.10= 1.282.The new Twinkle bulb has a standard deviation35hours. A randomsample of 50light bulbs is selected from inventory.Thesamplemeanwasfound to beX550hours.a.Find the margin of error Efor a 90% confidence interval.(5 points)Round your answer to the nearest hundredths..(References:definition of margin of error on page 312 and example 2 onpage 312).E = 1.645 (35/√50) = 8.14b.Construct a 90% confidence interval for the mean life,of all Twinklebulbs.(5 points)(References: example 5page 315, end ofsection exercises51-56pages 319-320)Left Endpoint:550–8.14 = 541.86Right Endpoint:550 + 8.14 = 558.14541.86 <μ< 558.143. A standard placement test has a mean of 115and a standard deviation of= 10. Determine the minimumsample size if we want to be 90% certainthat we arewithin 2pointsof the true mean.(References: example 6page 316, end of section exercises58-62pages 321-322)(5points)n = (1.645)(10)² = 271Section 6.2: Confidence Intervals for the Mean (Small Samples)

Page 2

MM207 Unit 6: Confidence Intervals for Means and Population Proportions - Page 2 preview image

Loading page image...

Study Now!

XY-Copilot AI
Unlimited Access
Secure Payment
Instant Access
24/7 Support
Document Chat

Document Details

University
Kaplan University School of Business and Management
Course
MM 207
Subject
Mathematics

Related Documents

View all
Solved Assignments

MM207 Unit 5: Normal Distribution, Probabilities, and Sampling Distributions

Examines normal distribution and sampling techniques.

Solved Assignments

MM207 Correlation and Linear Regression Analysis: Examining Relationships in Real-World Data

Analyzes correlation and regression in applied settings.

Solved Assignments

MM207 Mid-Term Project Kaplan University

Covers statistical concepts and data analysis in mathematics.

Solved Assignments

MM207 Unit 9 Final Project Assignment and Template Kaplan University

Final project assignment and template for Unit 9 of MM207.

Solved Assignments

MM207 Unit 7: Hypothesis Testing for Means and Proportions

Explores hypothesis testing methods in statistical analysis.

Solved Assignments

MM207 Unit 4: Probability Distribution and Binomial Probability Analysis

Explores probability distributions and binomial probability.

Exam Guides

AP Calculus AB Scoring Guide Unit 6 Progress Check

This math problem asks to find 𝑓(3) using values from a twice-differentiable function’s table. It tests understanding of derivatives and function behavior from given data points.

Solved Assignments

Clinical Psychologist

Grand Canyon University MAT-144 assignment “Clinical Psychologist” by Steven Hughes (Nov 3, 2024). Includes grading notes and an “Income and Projection” section with behavioral health salary estimates and a monthly expense budget table.

Class Notes

Module 4 Matrices

Overview of matrices: rectangular arrays of numbers, defining rows/columns and entries. Covers dimensions (m×n), locating entries, types (square, row, column matrices), and using matrices for computations (e.g., soccer equipment costs).

Solved Assignments

MATH 1324 Homework 5 Answers

MATH 1324 Finite Math: Homework on compound interest. Calculate future value of a trust fund with 2.5% annual interest over 35 years. Learn to identify and apply the correct interest formulas.