MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is significantly smaller than 59% at a level of significance of α α = 0.05. According to your sample, 52 out of 89 potential voters prefer the Democratic candidate.
- For this study, we should use Select an answer z-test for a population proportion t-test for a population mean Correct
- The null and alternative hypotheses would be:
Ho: ? p μ Correct Select an answer ≠ = < > Correct Correct (please enter a decimal)
H1: ? μ p Correct Select an answer = ≠ < > Correct Correct (Please enter a decimal)
- The test statistic ? z t Correct = (please show your answer to 3 decimal places.)
- The p-value = (Please show your answer to 4 decimal places.)
- The p-value is ? ≤ > αα
- Based on this, we should Select an answer reject accept fail to reject Incorrect the null hypothesis.
- Thus, the final conclusion is that ...
- The data suggest the population proportion is not significantly smaller than 59% at αα = 0.05, so there is not sufficient evidence to conclude that the proportion of voters who prefer the Democratic candidate is smaller than 59%.
- The data suggest the population proportion is not significantly smaller than 59% at αα = 0.05, so there is sufficient evidence to conclude that the proportion of voters who prefer the Democratic candidate is equal to 59%.
- The data suggest the populaton proportion is significantly smaller than 59% at αα = 0.05, so there is sufficient evidence to conclude that the proportion of voters who prefer the Democratic candidate is smaller than 59%
- Interpret the p-value in the context of the study.
- There is a 45.62% chance that fewer than 59% of all voters prefer the Democratic candidate.
- If the population proportion of voters who prefer the Democratic candidate is 59% and if another 89 voters are surveyed then there would be a 45.62% chance fewer than 58% of the 89 voters surveyed prefer the Democratic candidate.
- If the sample proportion of voters who prefer the Democratic candidate is 58% and if another 89 voters are surveyed then there would be a 45.62% chance of concluding that fewer than 59% of all voters surveyed prefer the Democratic candidate.
- There is a 59% chance of a Type I error.
- Interpret the level of significance in the context of the study.
- There is a 5% chance that the earth is flat and we never actually sent a man to the moon.
- There is a 5% chance that the proportion of voters who prefer the Democratic candidate is smaller than 59%.
- If the proportion of voters who prefer the Democratic candidate is smaller than 59% and if another 89 voters are surveyed then there would be a 5% chance that we would end up falsely concluding that the proportion of voters who prefer the Democratic candidate is equal to 59%.
- If the population proportion of voters who prefer the Democratic candidate is 59% and if another 89 voters are surveyed then there would be a 5% chance that we would end up falsely concluding that the proportion of voters who prefer the Democratic candidate is smaller than 59%
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