Jen H

Numerade Educator
Tutor

Biography

I love math! I've been teaching Math for 4 years. I'm a certified teacher.

Education

Jen has not yet added their education credentials.

Educator Statistics

Numerade tutor for 4 years
1144 Students Helped

Topics Covered

Unlocking the Power of Functions: Boost Your Programming Skills
Understanding the Normal Distribution: A Comprehensive Guide
Introduction to Sequences and Series
Exploring Probability Topics: From Basics to Advanced Strategies
Exploring the World of Derivatives: A Comprehensive Guide
Stand Out with Differentiation Strategies | Boost Your Business
Master Algebra Basics: Topics Reviewed at Semester Start
Introduction to Conic Sections
Master Trigonometry with Our Comprehensive Guide
Functions
Discover the Basics of Trigonometry: Your Introduction to Triangles
Unlocking Insights with Non-Parametric Statistics | Boost Your Analysis
Understanding Discrete Random Variables: A Comprehensive Guide
Breaking Limits: Unlock Your Potential with Our Expert Solutions
Mastering Integration Techniques for Optimal Results
Mastering Partial Derivatives: Essential Techniques and Tips
Exploring the Functions of Multiple Variables
Mastering Linear Functions: A Comprehensive Guide
Mastering Polynomials: Essential Tips and Tricks | [Brand Name]
Rational Functions: Understanding Their Properties and Applications
Mastering Multiple Integrals: Techniques and Tips
Balancing Markets and Welfare: Striving for Equilibrium
Unlocking Insights: Macroeconomic Data Analysis
The Macroeconomics of Open Economies: Understanding Global Markets
Introduction to Combinatorics & Probability: Understanding the Basics
Other Disorders: Eating Disorders, Schizophrenia and Dissociative Disorders
Mastering Equations and Inequalities: Your Guide to Mathematical Success
Discover the Power of Right Triangles in Geometry
Exploring Relationships Within Triangles
Unlocking the Power of Confidence Intervals: A Comprehensive Guide
Unlocking the Power of Chemical Reactions: A Comprehensive Guide
Mastering Chemical Reactions and Stoichiometry for Optimal Results
Mastering Integrals: Tips and Tricks for Calculus Success
Unlocking Insights with Descriptive Statistics: A Comprehensive Guide
Solving Systems of Equations and Inequalities: A Comprehensive Guide
Mastering Matrices: An Introduction to the Fundamentals
The Normal Distribution
Understanding Moment Impulse and Collisions for Better Physics

Jen's Textbook Answer Videos

02:43
Calculus: Early Transcendentals

Some of the highest tides in the world occur in the Bay of Fundy on the Atlantic Coast of Canada. At Hopewell Cape the water depth at low tide is about 2.0 m and at high tide it is about 12.0 m. The natural period of oscillation is about 12 hours and on June 30, 2009, high tide occurred at 6:45 am. Find a function involving the cosine function that models the water depth $ D(t) $ (in meters) as a function
of time $ t $ (in hours after midnight) on that day.

Chapter 1: Functions and Models
Section 3: New Functions from Old Functions
Jen H
01:22
Biocalculus Calculus for the Life Sciences

The Pacific halibut fishery has been modeled by the equation $$B(t)=\frac{8 \times 10^{7}}{1+3 e^{-0.71 t}}$$
where $B(t)$ is the biomass (the total mass of the members of the population) in kilograms at time $t$. What is $\lim _{t \rightarrow \infty} B(t)?$ What is the significance of this limit?

Chapter 2: Limits
Section 2: Limits of Functions at Infinity
Jen H
01:15
Precalculus: Graphical, Numerical, Algebraic

In Exercises $11-16$ , determine whether the function is a monomial function, given that $l$ and $\pi$ represent constants. For those that are monomial functions state the degree and leading coefficient. For those that are not, explain why not.
$$
f(x)=-4
$$

Chapter 2: Polynomial, Power, and Rational Functions
Section 2: Power Functions with Modeling
Jen H
01:11
Precalculus: Graphical, Numerical, Algebraic

In Exercises $7-12$ , find the period of the function and use the language of transformations to describe how the graph of the function is related to the graph of $y=\cos x .$
$$
y=\cos 3 x
$$

Chapter 4: Trigonometric Functions
Section 4: Graphs of Sine and Cosine: Sinusoids
Jen H
02:20
Calculus Early Transcendentals

As seen in Example $3,$ the equation $x^{2}+y^{2}=25$ does not define $y$ as a function of $x$. Each graph in these exercises is a portion of the circle $x^{2}+y^{2}=25 .$ In each case, determine whether the graph defines $y$ as a function of $x,$ and if so, give a formula for $y$ in terms of $x .$

Chapter 0: BEFORE CALCULUS
Section 1: Functions
Jen H
1 2 3 4 5 ... 9

Jen's Quick Ask Videos

02:43
Intro Stats / AP Statistics

In order to earn credit for taking Advanced Placement classes, students must pass the end-of-course AP test. A government teacher thinks that by adding after-school review sessions, students will improve their scores on the AP test. The government teacher works with 30 students for a month before they go to their administration about implementing this review program school-wide. The government teacher believes that she can get the program implemented school-wide if student scores increase by more than 1 point. The government teacher will test a hypothesis using α=0.05.

In this context, which do you consider to be more serious - a Type I or a Type II error? Justify. (4pts)

Jen H
07:43
Intro Stats / AP Statistics

The following relative frequency distribution was constructed from a population of 350. Calculate the population mean, the population variance, and the population standard deviation. (Negative values should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answers to 2 decimal places.)

Class Relative Frequency
-20 up to -10 0.38
-10 up to 0 0.20
0 up to 10 0.34
10 up to 20 0.08

Jen H
04:17
Intro Stats / AP Statistics

According to the Census Bureau, 3.36 people reside in the
typical American household. A sample of 28 households in Arizona
retirement communities showed the mean number of residents per
household was 2.74 residents. The standard deviation of this sample
was 1.16 residents. At the .10 significance level, is it reasonable
to conclude the mean number of residents in the retirement
community household is less than 3.36 persons?
Compute the value of the test statistic. (Negative
amount should be indicated by a minus sign. Round your answer to 3
decimal places.)

Jen H
11:43
Intro Stats / AP Statistics

Data from 14 cities were combined for a 20-year period, and the total 280 city-years included a total of 153 homicides. After finding the mean number of homicides per city-year, find the probability that a randomly selected city-year has the following numbers of homicides, then compare the actual results to those expected by using the Poisson probabilities:

Homicides each city-year
a. 0
b. 1
c. 2
d. 3
e. 4

Actual results
162
89
24
4
1

a.
P(0)=
P(1)=
P(2)=
P(3)=
P(4)=
(Round to four decimal places as needed.)

Jen H
04:01
Intro Stats / AP Statistics

Annie is concerned over a report that "a woman over age 40 has a better chance of being killed by a terrorist than of getting married." A study found that the likelihood of marriage for a never-previously-wed, 40-year-old university-educated American woman was 2.6%. To demonstrate that this percentage is too small, Annie uses her resources at the Baltimore Sun to conduct a simple random sample of 498 never-previously-wed, university-educated, American women who were single at the beginning of their 40s and who are now 45. Of these women, 18 report now being married. Does this evidence support Annie’s claim, at the 0.05 level of significance, that the chances of getting married for this group is greater than 2.6%?

Jen H
06:01
Intro Stats / AP Statistics


Students who apply to MBA programs must take the Graduate
Management Admission Test (GMAT).
University admissions committees use the GMAT score as one of
the critical indicators of how well a student is likely to perform
in the MBA program.
To judge how well the GMAT score predicts MBA performance, a
sample of 10 graduates was taken.
Their grade point averages in the MBA program (values from 0 to
12) and their GMAT score (values range from 200 to 800) are listed
below:
GMAT
GPA
599
9.6
689
8.8
584
7.4
631
10.0
594
9.2
643
7.8
656
9.6
594
11.2
710
8.4
611
7.6
Suppose that university admissions committees consider a GMAT
score higher than 600 as an indicator of a good candidate, and a
GPA higher than 9.0 as a good performance.
Find the probability distribution table that correctly
summarizes the data.
a.
GMAT higher than 600
GMAT lower than or equal to 600
GPA higher than 9.0
0.3
0.3
GPA lower than or equal to 9.0
0.2
0.2
b.
GMAT higher than 600
GMAT lower than or equal to 600
GPA higher than 9.0
0.3
0.2
GPA lower than or equal to 9.0
0.3
0.2
c.
GMAT higher than 600
GMAT lower than or equal to 600
GPA higher than 9.0
0.4
0.1
GPA lower than or equal to 9.0
0.2
0.3
d.
GMAT higher than 600
GMAT lower than or equal to 600
GPA higher than 9.0
0.3
0.3
GPA lower than or equal to 9.0
0.3
0.1
e.
GMAT higher than 600
GMAT lower than or equal to 600
GPA higher than 9.0
0.2
0.3
GPA lower than or equal to 9.0
0.4
0.1
When a customer enters a grocery market, the joint probability
of buying milk and beer is given in the following table.
Buy Milk
Not buy milk
Buy Beer
30%
10%
Not buy beer
40%
20%
We denote "buying milk" and "buying beer" as M and B,
respectively. What is ?
Buy milk
Not buy milk
Buy beer
Not buy beer
70%
80%
50%
90%
60%

Jen H
1 2 3 4 5 ... 129