Dix 1
Alysha Dix
Prof. D. Jonaitis
Math-2342-81090
6 September 2016
Project 1
My article that I chose is entitled Beating also cause traumatic brain injuries.
Throughout this article a woman named Susan Contreras is used as an example of how domestic
abus
1. The value given below is discrete. Use the continuity correction and describe the region of the normal
distribution that corresponds to the indicated probability.
Probability of exactly 3 passengers who do not show up for a flight is
The area between 2
Ch. 5 Homework (13 problems)
1.
a) Continuous random variable
b) Continuous random variable
c) Not a random variable
d) Continuous random variable
e) Continuous random variable
f) Continuous random variable
a) Discrete random variable
b) Continuous random
1. A margin of error of 100 points seems too high to provide a good estimate of the mean score
Z alpha/2=1.96
2. Find the critical value z Subscript alpha divided by 2 z/2 that corresponds to alpha=0.20
Z alpha/2= 1-0.20/2 =0.9
Z 0.1=1.28
3.
4. Use the sa
Ch.6.2 & 6.3 HW
1. Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and standard
deviation 1.
The indicated z score is 2.16
2. Assume that a randomly selected subject is given a bone density test. Those test score
1. Using the simple random sample of weights of women from a data set, we obtain these
sample statistics: n=40 and x overbar=145.02 lb. Research from other sources suggests
that the population of weights of women has a standard deviation given by =30.08 l
Stats: Correlation & Regression
Definitions
Coefficient of Determination
The percent of the variation that can be explained by the regression equation
Correlation
A method used to determine if a relationship between variables exists
Correlation Coefficien
Stats: Counting Techniques
Definitions
Factorial
A positive integer factorial is the product of each natural number up to and
including the integer.
Permutation
An arrangement of objects in a specific order.
Combination
A selection of objects without rega
Statistics: Data Description
Definitions
Statistic
Characteristic or measure obtained from a sample
Parameter
Characteristic or measure obtained from a population
Mean
Sum of all the values divided by the number of values. This can either be a
population
Stats: Estimation
Definitions
Confidence Interval
An interval estimate with a specific level of confidence
Confidence Level
The percent of the time the true mean will lie in the interval estimate given.
Consistent Estimator
An estimator which gets closer
Statistics: Frequency Distributions & Graphs
Definitions
Raw Data
Data collected in original form.
Frequency
The number of times a certain value or class of values occurs.
Frequency Distribution
The organization of raw data in table form with classes and
Stats: Hypothesis Testing
Definitions
Null Hypothesis ( H0 )
Statement of zero or no change. If the original claim includes equality (<=, =, or
>=), it is the null hypothesis. If the original claim does not include equality (<, not
equal, >) then the null
Stats: Normal Distribution
Definitions
Central Limit Theorem
Theorem which stats as the sample size increases, the sampling distribution of
the sample means will become approximately normally distributed.
Correction for Continuity
A correction applied to
Stats: Probability Distributions
Definitions
Random Variable
Variable whose values are determined by chance
Probability Distribution
The values a random variable can assume and the corresponding probabilities
of each.
Expected Value
The theoretical mean o
Stats: Probability
Definitions
Probability Experiment
Process which leads to well-defined results call outcomes
Outcome
The result of a single trial of a probability experiment
Sample Space
Set of all possible outcomes of a probability experiment
Event
On
Statistics: Introduction
Definitions
Statistics
Collection of methods for planning experiments, obtaining data, and then
organizing, summarizing, presenting, analyzing, interpreting, and drawing
conclusions.
Variable
Characteristic or attribute that can a