Statistics Assignment about Hypothesis and Type1/2 Errors

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PSY 320 Lab 4 (Ch. 7 & 9) Hypothesis & Significance T,T/TH 1 Due by 10/4 end of day Please circle the lab day/s you are in above. 1. Come up with two different research ideas that are not in the book or have been discussed in lecture. For each research question, please answer all of the following: a. b. c. d. e. What is the null hypothesis? What is the research hypothesis? What is the independent variable? What is the dependent variable? What type of measurement could be used in the dependent variable? 2. According to the book and in lecture, what are the criteria used to make a hypothesis a good one? 3. What is meant by “one-tailed” and “two-tailed” tests? Give an example of a research question for each. 4. State and explain a type I and type II error using one of the research questions above. 5. Draw a normal distribution curve for the two different types of hypothesis with the critical value percent cut off and decision to reject or fail to reject null hypothesis. a. Unidirectional b. Non directional
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PSY 320 Lab 4 (Ch.7 & 9) Hypothesis & Significance T,T/TH1
Due by 10/4 end of day
Please circle the lab day/s you are in above.
1. Come up withtwo different research ideas that are not in the book or have been
discussed in lecture. For each research question, please answer all of the following:
a. What is the null hypothesis?
Answer:
When we say null hypothesis, it is unacceptable results of the prediction of
researcher or experimenter. The experimenter will going to decide null
hypotheses once the result shows NO statistical significance, therefore, it is not
acceptable, so, he or she will going to disapprove.
b. What is the research hypothesis?
Answer:
This is a statement that implies the presence of relationship between the two
variables such as dependent and independent.
c. What is the independent variable?\
Answer:
An independent variable is the variable you have control over, what you can
choose and manipulate. It is usually what you think will affect the dependent
variable. In some cases, you may not be able to manipulate the independent
variable.
d. What is the dependent variable?
Answer:
This variable will always be in a numeric variable, in which, this independent on
the independent variable given.

PSY 320 Lab 4 (Ch.7 & 9) Hypothesis & Significance T,T/TH2
e. What type of measurement could be used in the dependent variable?
Answer:
The type of measurements that the dependent variable could be used is the
frequencies and test score of an experiment.
2. According to the book and in lecture, what are the criteria used to make a hypothesis a
good one?
Answer:
A good and strong ...


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