Sex is the first variable. It describes the gender (female or male) of the student. Since it is
a qualitative description, numbers would not be useful. Out of the total of 1405 students, 61.35%
or 862 of the students, are female and 38.65%
The research objective we are trying to answer with our analysis is what factors, or
variables are associated with a successful student? The purpose for this analysis is so that we can
be able to determine which students will be the highest
HUNTER COLLEGE OF THE CITY UNIVERSITY OF NEW YORK
Department of Mathematics and statistics
Exam III Practice Questions
1. The Distribution of Sample Means, that is, the Sampling Distribution, is not
composed of individual scores. Instead of individual sco
Professor: Alvin Thaler
Sep. 29, 2015
Part A: Pre-Project Plan
In this project, I have been asked to prepare an organized statistical report to help the
head of the admissions department ch
Problem 1. BBT-206-7: Using the 68-95-99.7 Rule
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to
find the following quantities.
1. Probability of scores less than 100 =
Professor: Ajay Khashu
Hunter College, Spring 2015
Statistics 113-23, Project Part C
Monday, April 13, 2015
Project Part C
The data set for our fro our project provides us with thirteen different variables:
SEX, HSP, GPA, AGE, CREDITS, CL
Colleges don't just admit students, there are various methods they use to decide who to
admit and who not to admit. With the help the data (Midwest) from the current students, I will be
able to help the admissions officer
Suppose we found the age and weight
for each person in a sample of 10
adults. Is there any relationship There
between the age and weight of does not
Do you think there is a be a
Random Variables and
Random Variable A numerical variable whose value
depends on the outcome of a chance
Associates a numerical value with
each outcome of a chance
Two types of random variables
for Describing Data
Suppose we want to know the MEAN
-length of all the fish in Lake Lewisville .
Fixed value about a population
Is this a value that is known?
Can we find it out?
Suppose two six-sided die is rolled and
they both land on sixes.
Or a coin is flipped and it lands on
Or record the color of the next 20 cars
to pass an intersection.
These would be examples of chance
Analysis of Variance
The articleto compare the means, the
In order Could Mean Platelet Volume be a
Predictive Marker for Acute Myocardial
researchers must use a procedure
Infarction? (Medical Science Monitor, 2005)
called a single factor analys
4-8 Confidence |ntervals.notebook April 08, 2014 4-8 Confidence |nterva|s.notebook April 08, 2014
Verizon decides to conduct a study on the text messaging habits of their customers. Suppose that
the mean number of text messages sent
Describing a distributions center:
Notation: max=largest value
n=number of values (or count)
= sigma ;
Mean: average = sum of all values divided by the count
Median: middle value
Ex: homework time 1: (5, 10,
we made these intervals using sampling distributions. Recall that the
sampling distribution is normal if the population is normal or n is greater
than or equal to 30.
We use the standard deviation of the sampling distribution to con
4-29 Hypothesis Testing.notebook April 29, 2014
2i? Cmskztyf 014370 Cort date
35+. 2% SSOiS
SSOE $0 4-29 Hypothesis Testing.notebook April 29, 2014
Do Americans Sleep Enough?
Studies have shown that a lack of sleep is linked to cognitive impai
Condence intervals for a population mean:
To use condence intervals we must rst verify that either the population
is normally distributed or that the sample size is at least 30. In either
cases we know that the sampling distribution is normal.
Suppose we wanted to estimate the
proportion of blue candies in a VERY
How might we go about estimating this
We could take a a
We would have
sample of candies
and a statisticthe
Using a Single Sample
Sharing prescription drugs with others
can be dangerous. Is this a common
occurrence among teens?
How do we answers
questions like these using
The National Association of Colleges and
Hunter College of CUNY
Department of Mathematics and Statistics
ELEMENTARY PROBABILITY AND STATISTICS
Course Description: An Introduction to applied statistics and statistical computing. Hands-on data analysis. Graphical infere
Final Exam Review
For best effect you should look at the following slides in
presentaton vieworreading view; do not use the normal (i.e.
Otherwise you will see the answer together with the question
and wont be
Re-read your notes: consolidate, trim, clarify and condense.
Make sure you know where, in your notes, everything IS.
Try to be able to define all terminology. (Maybe definitions should be highlighted
in your notes?)
Mathematics and Statistics
This worksheet is meant to provide an opportunity to practice doing hypothesis
testing in a structured way. It is meant to be done after you do the required reading.
Null and Alternative Hypothesis Pract
Mathematics & Statistics
Confidence Interval Worksheet
Sample Question: You are a psychology student, and you are asked to do a confidence interval based on a
random sample of 64 people. You are taking their mood scores and trying to estimate what t
1) An experiment to study the lifetime (in hours) for a certain type of component involved
putting 10 components into operation and observing them for 100 hr. Eight of the
components failed during that period, and those lifetimes were recorded. There were
Collecting Data Sensibly
Note: Correct usage of the vocabulary in this
chapter is VERY important!
Consider the imply that spanking is the
These headlines following headlines
CAUSE of the observed difference in 25,
which occurred on SeptemberIQ.
Suppose we were to investigate the
relationship between y = the first-year
college grade point average and x = high
school grade point average.
The first-year college grade
Comparing Two Populations or
Suppose we have a population of adult men
with a mean height of 71 inches and
standard deviation of 2.5 inches. We also
have a population of adult women with a
mean height of 65 inches and standard