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ID: MST.FET.IS.SC.01.0010A
A market research firm has carried out an observational study on the chief executives from a random
selection of the law firms in the country. With reference to this country, the group of chief executives that
were stud
Introductory Statistics Third Edition
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The philosophy of hypothesis testing [feedback
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Introductory Statistics Third Edition
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Considerations in hypothesis testing [feedback
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Introductory Statistics Third Edition
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Hypothesis testing for population parameters
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Introductory Statistics Third Edition
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The P-value approach to hypothesis testing [feedback
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Introductory Statistics Third Edition
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Completing the methodology of hypothesis testing
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7/28/2017
Confidence interval for the mean, sigma unknown
Introductory Statistics Third Edition
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Confidence interval for the mean, sigma unknown [feedback page]
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Introductory Statistics Third Edition
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The methodology of estimation [feedback page]
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Introductory Statistics Third Edition
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Hypothesis testing for population parameters
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Confidence interval for the proportion
Introductory Statistics Third Edition
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Confidence interval for the proportion [feedback page]
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Introductory Statistics Third Edition
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Inferences about two population means [feedback
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Introductory Statistics Third Edition
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Regression fundamentals [feedback page]
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Introductory Statistics Third Edition
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Inferences about two population proportions [feedback page]
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Introductory Statistics Third Edition
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Multiple regression [feedback page]
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Introductory Statistics Third Edition
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Dealing with two population parameters
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Inferences about mean differences [feedback
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Revisiting relationships [feedback page]
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Introductory Statistics Third Edition
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The simple linear regression model [feedback
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Introductory Statistics Third Edition
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The basic methodology of hypothesis testing
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Sampling distributions and inference
Introductory Statistics Third Edition
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Sampling distributions and inference [feedback page]
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Chapter 1
Introduction to statistics
1
Statistical concepts
Why study statistics?
Suppose youre in a situation where you want to
answer a question or explain something
e.g. Do men earn more than women?
You can collect and analyze data
Then, you use t
Chapter 3
Measuring data
1
Measuring data versus presenting data
We present data to help us draw meaning from it
But pictures of data are subjective
Theyre also not susceptible to rigorous inference
Measuring data is less subjective, more rigorous
Th
POS 401 Chapter 3 Key Points
Essential points
The following points are essential for the rest of the semester.
1. How to calculate and interpret the mean, median and mode. How to identify the median and mode in
a data table or plot.
Contrary to the textb
POS 401 Chapter 4 Key Points
Essential points
The following points are essential for the rest of the semester.
1. You should understand the difference between a deterministic and a probabilistic process. Probabilistic
is essentially what Thompson refers t
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ID: MST.FET.PD.PND.01.0010A
As part of a study into the effectiveness of television advertizing in his local area, Huw conducts a survey where he asks a sample of
people how many hours of television they watch per week. The data from this survey
As part of a study into the effectiveness of television advertizing in his local area, Huw conducts a survey where he asks a sample of
people how many hours of television they watch per week. The data from this survey is summarized in the following freque
The Mean Corporation has developed a new soft drink flavor and is considering taking it into mass production. They decide to offer
samples of the drink to 50 people in order to get some idea of how well the drink may sell. The 50 people are asked if they
Presenting numerical data [feedback
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Question 1
0 out of 2 points
A sample is obtained from a population with = 12. If the sample mean has a standard error of 3,
then the sample size is n = 4.
Selected Answer: True
Question 2
3 out of 3 points
The null hypothesis:
Selected Answer: states th
7/28/2017
Sampling distribution of the mean
Introductory Statistics Third Edition
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Sampling distribution of the mean [feedback page]
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7/28/2017
Bayes' Theorem
Introductory Statistics Third Edition
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Bayes' Theorem [feedback page]
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7/28/2017
Sampling distribution of the proportion
Introductory Statistics Third Edition
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Sampling distribution of the proportion [feedback page]
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7/28/2017
A notion of probability
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A notion of probability [feedback page]
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set by cli
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The philosophy of estimation
Introductory Statistics Third Edition
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The philosophy of estimation [feedback page]
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