K S

Columbia University in the City of New York
Educator

Biography

I am pursuing a PhD.

Education

BS Physics
Columbia University in the City of New York

Educator Statistics

Numerade tutor for 4 years
356 Students Helped

Topics Covered

Mastering Motion: Achieving Efficiency Along a Straight Line
Mastering Newton's Laws: Tips for Applying Them Effectively

K's Textbook Answer Videos

1

K's Quick Ask Videos

01:45
Intro Stats / AP Statistics

Imagine yourself at a fair playing one of the midway games. Pick
a game and calculate the expected value and post your results along
with how you calculated them. For example, you may decide to throw
a basketball to try to win a $10 bear. You paid $2.00 for three
shots. What is the expected value? (Please do not use this
example in your answer)

K S
01:25
Intro Stats / AP Statistics

You look down at the digital speedometer in your car and see
that your speed is 32 miles per hour (rounded to the nearest whole
number). What are the upper and lower real limits of your speed? Is
it likely that you are traveling at exactly 32 miles per hour?

K S
01:04
Calculus 1 / AB

Consider the following problem.
Find the distance traveled in 28 seconds by an object
traveling at a constant velocity of 18 feet per
second.
Decide whether the problem can be solved using precalculus, or
whether calculus is required.
The problem can be solved using precalculus. The problem requires
calculus to be solved.
If the problem can be solved using precalculus, solve it. If the
problem seems to require calculus, use a graphical or numerical
approach to estimate the solution.
ft

K S
01:32
Intro Stats / AP Statistics

Sandra, a sociologist, is studying the extent of introversion
and extroversion in individuals. So, she has several subjects
take the Myers-Briggs personality test and records their level of
extroversion (0 meaning a complete introvert up
to 100 meaning a complete extrovert), shown
below.
91,96,80,81,48,33,15,75,34,79
Suppose that anyone with a score
of 0 to 49 is considered an introvert, and
anyone with a score of 50 to 100 is considered
an extrovert. Use the TI-83 or 84 to draw a histogram for
these values. Using that histogram, determine how many
more extroverts were in the study than introverts.
Provide your answer below:
Subjects =

K S
01:01
Intro Stats / AP Statistics

5.20 High School and Beyond, Part
I: The National Center of Education Statistics
conducted a survey of high school seniors, collecting test data on
reading, writing, and several other subjects. Here we examine a
simple random sample of 200 students from this survey. Side-by-side
box plots of reading and writing scores as well as a histogram of
the differences in scores are shown below.

K S
01:22
Intro Stats / AP Statistics

The Lubricant is an expensive oil newsletter to which many oil giants subscribe, including Ken Brown (see the above table). In the last issue, the letter described how the demand for oil products would be extremely high. Apparently, the American consumer will continue to use oil products even if the price of these products doubles. Indeed, one of the articles in the Lubricant states that the chances of a favorable market for oil products was 75%, while the chance of an unfavorable market was only 25%. Ken would like to use these probabilities in determining the best decision.

EQUIPMENT
FAVORABLE MARKET ($)
UNFAVORABLE MARKET ($)
Sub 100
225,000
-250,000
Oiler J
325,000
-105,000
Texan
70,000
-18,000

a. What decision model should be used?
b. What is the optimal decision?

K S
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