A car manufacturer claims that their new hybrid cars give at least 45 miles per gallon. The mean gas mileage and standard deviation of 23 random hybrid cars were 41 mpg and 10.3 mpg respectively. Is there enough evidence to refute the manufacturer's claim? Use a = 0.05. 1. Identify the parameter(s) 5. Rejection Region or p-value 2. Null Hypothesis 6. Conclusion 3. Alternative Hypothesis 4. Test Statistic

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1. A car manufacturer claims that their new hybrid cars give at least 45 miles per gallon. The mean gas
mileage and standard deviation of 23 random hybrid cars were 41 mpg and 10.3 mpg respectively. Is there
enough evidence to refute the manufacturer's claim? Use a = 0.05.
1. Identify the parameter(s)
5. Rejection Region or p-value
2. Null Hypothesis
6. Conclusion
3. Alternative Hypothesis
4. Test Statistic
Transcribed Image Text:1. A car manufacturer claims that their new hybrid cars give at least 45 miles per gallon. The mean gas mileage and standard deviation of 23 random hybrid cars were 41 mpg and 10.3 mpg respectively. Is there enough evidence to refute the manufacturer's claim? Use a = 0.05. 1. Identify the parameter(s) 5. Rejection Region or p-value 2. Null Hypothesis 6. Conclusion 3. Alternative Hypothesis 4. Test Statistic
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