Question

# You are conducting a study to see if the proportion of voters who prefer the Democratic...

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 αα = 0.10. According to your sample, 51 out of 88 potential voters prefer the Democratic candidate.

1. For this study, we should use Select an answer t-test for a population mean z-test for a population proportion
2. The null and alternative hypotheses would be:
Ho: ? p μ  Select an answer < > = ≠   (please enter a decimal)
H1: ? μ p  Select an answer ≠ < > =   (Please enter a decimal)
3. The p-value is ? > ≤  αα
4. Based on this, we should Select an answer reject fail to reject accept  the null hypothesis.
5. Thus, the final conclusion is that ...
• The data suggest the population proportion is not significantly smaller than 59% at αα = 0.10, 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 populaton proportion is significantly smaller than 59% at αα = 0.10, so there is 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 = 0.10, so there is sufficient evidence to conclude that the proportion of voters who prefer the Democratic candidate is equal to 59%.
6. Interpret the p-value in the context of the study.
• If the population proportion of voters who prefer the Democratic candidate is 59% and if another 88 voters are surveyed then there would be a 42.1% chance fewer than 58% of the 88 voters surveyed prefer the Democratic candidate.
• There is a 59% chance of a Type I error.
• If the sample proportion of voters who prefer the Democratic candidate is 58% and if another 88 voters are surveyed then there would be a 42.1% chance of concluding that fewer than 59% of all voters surveyed prefer the Democratic candidate.
• There is a 42.1% chance that fewer than 59% of all voters prefer the Democratic candidate.
7. Interpret the level of significance in the context of the study.
• There is a 10% chance that the earth is flat and we never actually sent a man to the moon.
• If the population proportion of voters who prefer the Democratic candidate is 59% and if another 88 voters are surveyed then there would be a 10% chance that we would end up falsely concluding 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 88 voters are surveyed then there would be a 10% chance that we would end up falsely concluding that the proportion of voters who prefer the Democratic candidate is equal to 59%.
• There is a 10% chance that the proportion of voters who prefer the Democratic candidate is smaller than 59%.

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