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Introductory statistics
The chi-square distribution
Lab 2: chi-square test of
Lab 2: chi-square test of independence
Class Time:
Names:
Student learning outcome
The student will evaluate if there is a significant relationship between favorite type of snack and gender.
Collect the data
Using your class as a sample, complete the following chart. Ask each other what your favorite snack is, then total the results.
Note You may need to combine two food categories so that each cell has an expected value of at least five.
Favorite type of snack
sweets (candy&baked goods)
ice cream
chips&pretzels
fruits&vegetables
Total
male
female
Total
Looking at
[link] , does it appear to you that there is a dependence between gender and favorite type of snack food? Why or why not?
Hypothesis test Conduct a hypothesis test to determine if the factors are independent:
H
0 : ________
H
a : ________
What distribution should you use for a hypothesis test?
Why did you choose this distribution?
Calculate the test statistic.
Find the
p -value.
Sketch a graph of the situation. Label and scale the
x -axis. Shade the area corresponding to the
p -value.
State your decision.
State your conclusion in a complete sentence.
Discussion questions
Is the conclusion of your study the same as or different from your answer to answer to question two under
Collect the Data ?
Why do you think that occurred?
Questions & Answers
define biology infour way
Explain the following terms .
(1) Abiotic factors in an ecosystem
Abiotic factors are non living components of ecosystem.These include physical and chemical elements like temperature,light,water,soil,air quality and oxygen etc
Qasim
passive process of transport of low-molecular weight material according to its concentration gradient
AI-Robot
what is production?
Catherine
how did the oxygen help a human being
how did the nutrition help the plants
Biology is a branch of Natural science which deals/About living Organism.
evolutionary history and relationship of an organism or group of organisms
AI-Robot
cell is the smallest unit of the humanity biologically
Abraham
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Source:
OpenStax, Introductory statistics. OpenStax CNX. May 06, 2016 Download for free at http://legacy.cnx.org/content/col11562/1.18
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