Chi-square independence
How to calculate the degrees of freedom?
How to calculate the degrees of freedom?
df= n-1
Calculate the degrees of freedom from the table.
4
Plot a chi-square graph
Calculate the p-value
(Problem 1, CHI SQUARE AND GOF)
https://www.toolshero.com/research/contingency-table/
0.14170815
From problem 15, write down the null and alternative hypotheses of the test
https://docs.google.com/document/d/15ay5IeayoZctQ3_9ayew5eAP6xXXJot8/edit
Ho: The running time of the movies can be modelled by N(88, 6.75)
H1: The running time of the movies cannot be modelled by N(88, 6.75)
Establish the null and alternative hypotheses of the problem
Ho: The TYPE OF SOFT DRINK is independent of the type of snack
H1: The TYPE OF SOFT DRINK is not independent of the type of snack
Calculate the missing expected frequencies of the distribution (a and b)
https://docs.google.com/document/d/15ay5IeayoZctQ3_9ayew5eAP6xXXJot8/edit
a= 57.6 and b=30.0
If the p-value is 0.0201 give the conclusion for the test at 5% of significance level
The Ho is rejected. H1 is accepted
Perform and State the conclusion for the test at 5% of significance level
https://docs.google.com/document/d/15ay5IeayoZctQ3_9ayew5eAP6xXXJot8/edit
df=4, p=0.0166, Ho is rejected