Gina Koch

Clarion University of Pennsylvania
Mathematics Teacher

Biography

I teach 7 Pre-Algebra, Algebra II, Statistics, and AP Calculus at North Clarion Jr/Sr High School in Tionesta, PA. I have been teaching there for 9 years. I have also taught STEM robotics for the past 2 years.

Education

BS Secondary Education, Mathematics
Clarion University of Pennsylvania
BS Mathematics
Clarion University of Pennsylvania
MA Education: Mathematics Concentration
Clarion University of Pennsylvania

Educator Statistics

Numerade tutor for 6 years
6 Students Helped

Topics Covered

Maximizing Accuracy with Effective Sampling and Data Analysis
Unlocking Insights with Descriptive Statistics: A Comprehensive Guide
Visualizing Data: Frequency Distributions & Graphs
Understanding the Normal Distribution: A Comprehensive Guide
Hypothesis Testing with Two Samples: A Comprehensive Guide

Gina's Textbook Answer Videos

02:00
The Practice of Statistics for AP

Binge drinking Who is more likely to binge drink—male or female college students? The Harvard School
of Public Health surveys random samples of male and female undergraduates at four-year colleges and
universities about whether they have engaged in binge drinking.
(a) Is this a problem about comparing means or comparing proportions? Explain.
(b) What type of study design is being used to produce data?

Chapter 10: Comparing Two Populations or Groups
Section 1: Comparing Two Proportions
Gina Koch
01:54
The Practice of Statistics for AP

Computer gaming Do experienced computer game players earn higher scores when they play with someone present to cheer them on or when they play alone? Fifty teenagers who are experienced at playing a particular computer game have volunteered for a study. We randomly assign 25 of them to play the game alone and the other 25 to play the game with a supporter present. Each player’s score is recorded.
(a) Is this a problem about comparing means or comparing proportions? Explain.
(b) What type of study design is being used to produce data?

Chapter 10: Comparing Two Populations or Groups
Section 1: Comparing Two Proportions
Gina Koch
01:56
The Practice of Statistics for AP

Credit cards and incentives A bank wants to know which of two incentive plans will most increase the use of its credit cards. It offers each incentive to a group of current credit card customers, determined at
random, and compares the amount charged during the following six months.
(a) Is this a problem about comparing means or comparing proportions? Explain.
(b) What type of study design is being used to produce data?

Chapter 10: Comparing Two Populations or Groups
Section 1: Comparing Two Proportions
Gina Koch
06:40
The Practice of Statistics for AP

Who uses instant messaging? Do younger people use online instant messaging (IM) more often than older people? A random sample of IM users found that 73 of the 158 people in the sample aged 18 to 27 said they used IM more often than email. In the 28 to 39 age group, 26 of 143 people used IM more often than email.$^{9}$ Construct and interpret a 90% confidence interval for the difference between the proportions of IM users in these age groups who use IM more often than email.

Chapter 10: Comparing Two Populations or Groups
Section 1: Comparing Two Proportions
Gina Koch
02:16
The Practice of Statistics for AP

Who owns iPods? As part of the Pew Internet and American Life Project, researchers surveyed a random sample of 800 teens and a separate random sample of 400 young adults. For the teens, 79% said that they own an iPod or MP3 player. For the young adults, this figure was 67%. Is there a significant difference between the population proportions? State appropriate hypotheses for a significance test to answer this question. Define any parameters you use.

Chapter 10: Comparing Two Populations or Groups
Section 1: Comparing Two Proportions
Gina Koch
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