What is a Type I error? Explain how the cumulative Type I error affects your decision
making. How is the two independent sample t-test different from ANOVA?
-What is a Type I error
A type I error is when the null hypothesis is rejected, when in
fact, it i

Whats the most important concept youve learned from this course that you can take
away and use in either your work or personal life?
The most important concept learned from this course that can be
used in either work or personal life is the concept hypoth

Why is the trend commonly thought to be the most important component of forecasting?
How is the linear trend method related to linear regression? Why are simple moving
averages and weighted averages commonly used forms of forecasting?
Why is the trend com

What is the purpose of forecasting? Why are forecasts not always correct? What are the
limitations of forecasting?
What is the purpose of forecasting?
Forecasting uses past data, patterns, or trends to predict
possible future outcomes. Forecasting can ass

Regression Paper
Using numerical data from one of the data sets available through the Data Sets link on your
page, develop one research question and formulate a hypothesis which can be tested with
linear regression analysis.
Prepare a 1,050-1,750-word pap

Please submit your weekly summary as responses to these four questions:
1. What is the single most important concept you learned this week?
The hypothesis is different, but, yes, the formal hypothesis
testing approach can be used for nonparametric tests.

Why do you use the chi-square statistic? What type of data is used with chi square
analysis? What are the nonparametric tests that correspond to each type of parametric
test in Week 1 and Week 2?
Why do you use the chi-square statistic?
The chi-square sta

Can the formal hypothesis testing approach be used for nonparametric tests? How are
parametric and nonparametric statistics different? How are parametric and
nonparametric statistics similar?
Can the formal hypothesis testing approach be used for nonparam

RES 342 Week 2 E-Text Assignment Answers
9.54 a.
b.
9.56 a.
b.
H0: 10 pages versus H1: > 10 pages. Reject H0 if t > 2.441. t = 5.90 so reject the null
hypothesis and conclude that the true mean is greater than 10 pages.
The p-value 0 so we would reject th

Describe the requirements that must be met before an ANOVA test can be used.
Discuss what the researcher should do if one of these requirements is not met.
-Describe the requirements that must be met before an ANOVA test can be used.
Independence
Equal va

Under what circumstances should a nonparametric test be used? Explain. What are the
strengths and weaknesses of nonparametric tests? Can the outcomes of nonparametric
tests be generalized to populations?
Under what circumstances should a nonparametric tes