Proportions and Confidence Intervals - Edubirdie

University:
Montgomery College
Course:
MATH 117: Elements of Statistics
Academic year:

2020
Views:

251

Pages:

12
Author:

chondinny0r70

Chapter 19 – Proportions P = population proportion (parameter) p-hat = sample proportion (statistic) TESTING HYPOTHESIS CONFIDENCE INTERVALS Must correct the formula and put “plus or minus” in place of “ p-hat (+/-) z-critical * standard deviation Using 15 instead of 10 is a way of compensating the use of p-hat instead of p SUMMARY Use 10 for testing hypothesis and 15 for confidence intervals Careful with notation - Notice: this proportion p is a population parameter NOT A P-VALUE, NOT A PROBABILITY ON A STATISTIC The simulation is done with a problem in which we know p in order to investigate the behavior of p-hat. Repeat the process many times to obtain the sampling distribution of p-hat For each sample compute p-hat and plot it in the histogram. p-hat are shown in the horizontal axis. The frequencies in the vertical axis Center is 0.21, spread from 0 to 0.5, shape slightly skewed This is an indication that selective abortion may be taking place

Related Documents

Proportions and Confidence Intervals

Proportions and Confidence Intervals - Page 1

Proportions and Confidence Intervals - Page 2

Proportions and Confidence Intervals - Page 3

Proportions and Confidence Intervals - Page 4

Proportions and Confidence Intervals - Page 5

Proportions and Confidence Intervals - Page 6

Proportions and Confidence Intervals - Page 7

Proportions and Confidence Intervals - Page 8

Proportions and Confidence Intervals - Page 9

Proportions and Confidence Intervals - Page 10

Proportions and Confidence Intervals - Page 11

Proportions and Confidence Intervals - Page 12

of 12

New Documents from this Course

Section 3.2: Understanding and Interpreting Confidence Intervals

Section 3.2: Understanding and Interpreting Confidence Intervals

Montgomery College MATH 117: Elements of Statistics

Answer Key

MATH 117, Elements of Statistics, Final Exam Review with Solutions

MATH 117, Elements of Statistics, Final Exam Review with Solutions

Montgomery College MATH 117: Elements of Statistics

Answer Key

Chapter 8, Section 8.1: Estimating a Population Mean - σ Known

Chapter 8, Section 8.1: Estimating a Population Mean - σ Known

Montgomery College MATH 117: Elements of Statistics

Answer Key

Estimating a Population Mean: σ Known (Section 8.1, Solutions)

Estimating a Population Mean: σ Known (Section 8.1, Solutions)

Montgomery College MATH 117: Elements of Statistics

Answer Key

Chapter 8, Section 8.2: Estimating a Population Mean - σ Not Known

Chapter 8, Section 8.2: Estimating a Population Mean - σ Not Known

Montgomery College MATH 117: Elements of Statistics

Answer Key

Sampling Distributions

Sampling Distributions

Montgomery College MATH 117: Elements of Statistics

Lecture Note

8.2 – Estimating a Population Proportion P, Constructing Confidence Intervals for Proportions

8.2 – Estimating a Population Proportion P, Constructing Confidence Intervals for Proportions

Montgomery College MATH 117: Elements of Statistics

Answer Key

Chapter 8, Section 8.3: Estimating a Population Proportion

Chapter 8, Section 8.3: Estimating a Population Proportion

Montgomery College MATH 117: Elements of Statistics

Answer Key

Chapter 8: Confidence Intervals – Two Populations Means

Chapter 8: Confidence Intervals – Two Populations Means

Montgomery College MATH 117: Elements of Statistics

Answer Key

Elements of Statistics: Chapter 4, Sections 4.1-4.3

Elements of Statistics: Chapter 4, Sections 4.1-4.3

Montgomery College MATH 117: Elements of Statistics

Answer Key

TI‐83/84 Calculator Programs Used in Statistics

TI‐83/84 Calculator Programs Used in Statistics

Montgomery College MATH 117: Elements of Statistics

Cheat Sheet