Question 1
1 / 1 point
TABLE 10-16
A realtor wants to compare the average sales-to-appraisal ratios of residential properties sold in
four neighborhoods (A, B, C, and D). Four properties are randomly selected from each
neighborhood and the ratios recorded
Question 1
1 / 1 point
TABLE 10-16
A realtor wants to compare the average sales-to-appraisal ratios of residential properties sold in
four neighborhoods (A, B, C, and D). Four properties are randomly selected from each
neighborhood and the ratios recorded
Question 1
1 / 1 point
How many Kleenex should the Kimberly Clark Corporation package of tissues contain?
Researchers determined that 60 tissues is the average number of tissues used during a cold.
Suppose a random sample of 100 Kleenex users yielded the
Quiz Submissions - Ch 1 & Ch 2 Practice Homework
HW 1 & 2
n1
1 / 1 point
Researchers are concerned that the weight of the average American school child is increasing
implying, among other things, that childrens clothing should be manufactured and marketed
Properties of the Student T distribution
1. The Student t distribution is different for different sample sizes.
2. The Student t distribution has the same general symmetric bell shape as the standard
normal distribution, but it reflects the greater variab
Math 142- 9082
E. Akanyirige Fall 2010
Exam#2 Chapters 3, 4 and 6.1 to 6.3 Review.
Chapter 3.2:
Do you understand the measures of the center, mean, median, mode, midrange?
Do you know how to determine the values of each measure from a grouped and
ungroupe
Chapter 8 Vocabulary
Null hypothesis: the value of a population parameter is equal to some claimed value.
Alternative hypothesis: the parameter has a value that somehow differs from the null
hypothesis.
The critical region (or rejection region) is the set
Chapter 8.1: Review and Preview
In statistics, a hypothesis is a claim or statement about a property of a population. A hypothesis test is a
procedure for testing a claim about a property of a population.
Chapter 8.2: Basics of Hypothesis Testing
Part 1:
Chapter 7 Vocabulary
Confidence Interval (or interval estimate) is a range (or an interval) of values used to
estimate the true value of a population parameter.
Confidence Level: The probability 1 - alpha that the confidence interval actually does
contain
Central Limit Theorem
Given
1. The random variable x has a distribution (which may or may not be normal) with
mean M and standard deviation o
2. Simple random sample of all the same size n are selected from the population
Conclusions
1. The distribution o
Random Variables:
A random variable is a variable that has a single numerical value, determined by
chance, for each outcome of a procedure. A probability distribution is a description that
gives the probability for each value of the random variable. It is
Definitions:
An event is any collection of results or outcomes of a procedure. A simple event is an
outcome or an event that cannot be further broken down into simpler components. The
sample space for a procedure consists of all possible simple events. Th
Binomial Probability Distrubtions
A binomial probability distribution results from a procedure that meets all the following
requirements: The procedure has a fixed number of trials, the trials must be
independent, each trial must have all outcomes classif
Duong (Young) Nguyen
Elementary Statistics
Assignment 4.7 (1-22, 24): Work Attached
1. Permutations and Combinations What is the basic difference between a situation requiring
application of the permutations rule and one that requires the combination rule
Duong (Young) Nguyen
Elementary Statistics
Assignment 4.5 (1-11, 13, 14, 15, 16, 18, 19, 21, 22): Worked Attached
1. Interpreting "At Least One" You want to find the probability of getting at least 1
defect when 10 heart pacemakers are randomly selected a
Duong (Young) Nguyen
Elementary Statistics
Assignment 4. 4 (1-13, 14, 15, 17, 21)
1. Independent Events Create your own example of two events that are independent,
and create another example of two other events that are dependent. Do not use
examples give
Duong (Young) Nguyen
Elementary Statistics
Assignment 4.3 (1-14, 17, 18, 21, 22, 27, 28, 29, 33, 34, 35, 36): Work
Attached
1. Disjoint Events A single trial of some procedure is conducted and the
resulting events are analyzed. in your own words, describe
Duong (Young) Nguyen
Elementary Statistics
Assignment 4.2 (1-18)
1. Interpreting Probability Based on recent results, the probability of someone in the
United Sates being injured while using sports or recreation equipment is 1/500. What
does it mean when
How to convert from a Nonstandard to a Standard Distribution
1. Sketch a normal cure, label the mean and the specific x values, then shade the
region representing the desired probability.
2. For each relevant value x that is a boundary for the shaded regi
The Standard normal Distribution
1. Its graph i bell shaped.
2. It's mean is equal to 0 (M = 0)
3. Its standard deviation is equal to 1.
The standard normal distribution is a normal probability distribution with M=0 and o-1.
The total area under its densi