Math Problem Statement
You are conducting a study to see if the accuracy rate for fingerprint identification is significantly more than 0.46. You use a significance level of α=0.10.
H0:p=0.46 H1:p>0.46
You obtain a sample of size n=227 in which there are 114 successes.
What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value =
The p-value is...
less than (or equal to) α
greater than α
This p-value leads to a decision to...
reject the null
accept the null
fail to reject the null
As such, the final conclusion is that...
There is sufficient evidence to warrant rejection of the claim that the accuracy rate for fingerprint identification is more than 0.46.
There is not sufficient evidence to warrant rejection of the claim that the accuracy rate for fingerprint identification is more than 0.46.
The sample data support the claim that the accuracy rate for fingerprint identification is more than 0.46.
There is not sufficient sample evidence to support the claim that the accuracy rate for fingerprint identification is more than 0.46.
Solution
To solve this, we will perform a hypothesis test for the population proportion, using the given information to calculate the p-value. Here’s the approach:
-
Define the Hypotheses:
- Null hypothesis ():
- Alternative hypothesis ():
-
Sample Proportion:
- Sample size,
- Number of successes,
- Sample proportion,
-
Calculate the Test Statistic: The test statistic for a proportion is calculated as: where .
-
Calculate the p-value: After finding the z-score, the p-value can be found using the standard normal distribution.
Let's perform these calculations.The p-value for this sample is approximately .
Analysis
- Comparison to : The p-value is slightly greater than .
- Decision: Since the p-value is greater than , we fail to reject the null hypothesis.
- Conclusion: There is not sufficient evidence to support the claim that the accuracy rate for fingerprint identification is more than 0.46.
Would you like further clarification or a detailed breakdown of any step?
Related Questions
- How would the result change if the significance level were 0.05 instead of 0.10?
- What does failing to reject the null hypothesis imply in the context of fingerprint identification?
- If the sample size increased while keeping the proportion of successes constant, how would it impact the p-value?
- How do we interpret a p-value in terms of Type I error in hypothesis testing?
- Why is it necessary to use a one-tailed test instead of a two-tailed test here?
Tip
Always check whether the test should be one-tailed or two-tailed based on the hypothesis statement, as this affects the interpretation of the p-value and the outcome of the test.
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Math Problem Analysis
Mathematical Concepts
Hypothesis Testing
Proportion Testing
One-Tailed Test
Formulas
Sample Proportion: \( \hat{p} = \frac{x}{n} \)
Test Statistic for Proportion: \( z = \frac{\hat{p} - p_0}{\sqrt{\frac{p_0 (1 - p_0)}{n}}} \)
Theorems
Central Limit Theorem
Suitable Grade Level
College Level - Introductory Statistics
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