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1. A company, which makes battery-operated cars, claims that its products have a mean life span of 5 years with a standard deviation of 10 years. If a random sample of 40 toy cars was tested and found to have a life mean of only 4 years. Test if the sample is a representation of the population at level of significance. Step 1: State the hypotheses. Step 2: The level of significance, one/two-tailed test, degrees of freedom Step 3: Statistical Test Step 4: Computation Step 5: Decision Rule Step 6: Reject Ho or Failed to Reject Ho Step 7: Conclusion

1. A company, which makes battery-operated cars, claims that its products have a mean life span of 5 years with a standard deviation of 10 years. If a random sample of 40 toy cars was tested and found to have a life mean of only 4 years. Test if the sample is a representation of the population at level of significance. Step 1: State the hypotheses. Step 2: The level of significance, one/two-tailed test, degrees of freedom Step 3: Statistical Test Step 4: Computation Step 5: Decision Rule Step 6: Reject Ho or Failed to Reject Ho Step 7: Conclusion

Calculus For The Life Sciences
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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1. A company, which makes battery-operated cars, claims that its products have a mean life span of 5 years with a standard deviation of 10 years. If a random sample of 40 toy cars was tested and found to have a life mean of only 4 years. Test if the sample is a representation of the population at level of significance. Step 1: State the hypotheses. Step 2: The level of significance, one/two-tailed test, degrees of freedom Step 3: Statistical Test Step 4: Computation Step 5: Decision Rule Step 6: Reject Ho or Failed to Reject Ho Step 7: Conclusion
Transcribed Image Text:1. A company, which makes battery-operated cars, claims that its products have a mean life span of 5 years with a standard deviation of 10 years. If a random sample of 40 toy cars was tested and found to have a life mean of only 4 years. Test if the sample is a representation of the population at level of significance. Step 1: State the hypotheses. Step 2: The level of significance, one/two-tailed test, degrees of freedom Step 3: Statistical Test Step 4: Computation Step 5: Decision Rule Step 6: Reject Ho or Failed to Reject Ho Step 7: Conclusion
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