How do I rewrite this in vertex form? Y=2x^2-8x+9
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Answer:
1)
2)
And we got the same decision reject the null hypothesis at 5% of significance.
Step-by-step explanation:
Previous concepts
The Chi-Square test of independence is used "to determine if there is a significant relationship between two nominal (categorical) variables". And is defined with the following statistic:
Where O rpresent the observed values and E the expected values.
State the null and alternative hypothesis
Null hypothesis: The distribution is 30% catfish, 15% bass, 40% bluegill, and 15% pike
Alternative hypothesis: The distribution is NOT 30% catfish, 15% bass, 40% bluegill, and 15% pike
The observed values are given by the table given:
Catfish =112, BAss = 95, Bluegill=210, Pike=83
Calculate the expected values
In order to calculate the expected values we can use the following formula for each cell of the table
Part 1: Calculate the statistic
Calculate the critical value
First we need to calculate the degrees of freedom given by:
Since the confidence provided is 95% the significance would be and we can find the critical value with the following excel code: "=CHISQ.INV(0.95,3)", and our critical value would be
We can calculate also the p value:
And we got the same decision reject the null hypothesis at 5% of significance.