Noah Vigran

Stanford University
Pre Calculus Tutor

Biography

I am a rising Junior at Stanford University studying Economics. I am a member of Stanford's varsity Swimming and Diving program. I have always loved math and putting my problem-solving abilities to the test. Most recently, I have done this while conducted market analysis and research as a member of the Stanford Consulting Group.

Education

BA Economics
Stanford University

Educator Statistics

Numerade tutor for 6 years
16 Students Helped

Topics Covered

Unlocking Insights: Correlation and Regression Analysis
Maximizing Accuracy with Effective Sampling and Data Analysis
Exploring Probability Topics: From Basics to Advanced Strategies
Master Probability and Counting Rules for Better Outcomes

Noah's Textbook Answer Videos

02:44
Elementary Statistics a Step by Step Approach

State which events are independent and which are dependent.
$$
\begin{array}{l}{\text { a. Tossing a coin and drawing a card from }} \\ {\text { a deck }} \\ {\text { b. Drawing a ball from an urn, not replacing it, and then }} \\ {\text { drawing a second ball }} \\ {\text { c. Getting a raise in salary and purchasing a }} \\ {\text { new car }} \\ {\text { d. Driving on ice and having an accident }}\end{array}
$$

Chapter 4: Probability and Counting Rules
Section 3: The Multiplication Rules and Conditional Probability
Noah Vigran
01:47
Elementary Statistics a Step by Step Approach

State which events are independent and which are dependent.
$$
\begin{array}{l}{\text { a. Having a large shoe size and having a }} \\ {\text { high IQ }} \\ {\text { b. A father being left-handed and a daughter being }} \\ {\text { left-handed }} \\ {\text { c. Smoking excessively and having lung }} \\ {\text { cancer }} \\ {\text { d. Eating an excessive amount of ice cream and }} \\ {\text { smoking an excessive amount of cigarettes }}\end{array}
$$

Chapter 4: Probability and Counting Rules
Section 3: The Multiplication Rules and Conditional Probability
Noah Vigran
01:34
Elementary Statistics a Step by Step Approach

Video and Computer Games Sixty-nine percent of U.S. heads of household play video or computer games. Choose 4 heads of household at random. Find the probability that
$$
\begin{array}{l}{\text { a. None play video or computer games. }} \\ {\text { b. All four do. }}\end{array}
$$

Chapter 4: Probability and Counting Rules
Section 3: The Multiplication Rules and Conditional Probability
Noah Vigran
00:59
Elementary Statistics a Step by Step Approach

Seat Belt Use The Gallup Poll reported that $52 \%$ of Americans used a seat belt the last time they got into a car. If 4 people are selected at random, find the probability that they all used a seat belt the last time they got into a car.

Chapter 4: Probability and Counting Rules
Section 3: The Multiplication Rules and Conditional Probability
Noah Vigran
01:31
Elementary Statistics a Step by Step Approach

Prison Populations If $25 \%$ of U.S. federal prison inmates are not U.S. citizens, find the probability that 2 randomly selected federal prison inmates will not be U.S. citizens.

Chapter 4: Probability and Counting Rules
Section 3: The Multiplication Rules and Conditional Probability
Noah Vigran
06:26
Elementary Statistics a Step by Step Approach

Government Employees In 2013 about $66 \%$ of full- time law enforcement workers were sworn officers, and of those, $88.4 \%$ were male. Females however make up $60.7 \%$ of civilian employees. Choose one law enforcement worker at random and find the following.
$$
\begin{array}{l}{\text { a. The probability that she is a female sworn officer }} \\ {\text { b. The probability that he is a male civilian employee }} \\ {\text { c. The probability that he or she is male or a civilian }} \\ {\text { employee }}\end{array}
$$

Chapter 4: Probability and Counting Rules
Section 3: The Multiplication Rules and Conditional Probability
Noah Vigran
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