alissa3329
30.03.2020 •
Mathematics
The mayor of a town has proposed a plan for the annexation of a new community. A political study took a sample of 1100 voters in the town and found that 37% of the residents favored annexation. Using the data, a political strategist wants to test the claim that the percentage of residents who favor annexation is more than 34%. State the null and alternative hypotheses.
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Ответ:
Null hypothesis:
Alternative hypothesis:
Step-by-step explanation:
Data given and notation
n=1100 represent the random sample taken
estimated proportion of residents favored annexation
is the value that we want to test
represent the significance level
z would represent the statistic (variable of interest)
Alternative hypothesis:
When we conduct a proportion test we need to use the z statistic, and the is given by:
(1)
The One-Sample Proportion Test is used to assess whether a population proportion is significantly different from a hypothesized value .
Calculate the statistic
Since we have all the info requires we can replace in formula (1) like this:
Statistical decision
It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.
The next step would be calculate the p value for this test.
Since is a right tailed test the p value would be:
Ответ:
So,
The answer is 60%