# Critical value method reject ho if t 196 ot t196 3

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Chapter 19 / Exercise 19.10
Engineering Fundamentals: An Introduction to Engineering
Moaveni
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Critical value method: Reject Ho if t<-1.96 ot t>1.96
3. Conduct the test a. Are there any unusual observations that question the integrity of the data or the assumptions of the model? (additional problem only)
b. Is the decision to reject or fail to reject Ho?
4. Conclusions - State a one paragraph conclusion that is consistent with the decision using language that is clearly understood in the context of the problem. Address any potential problems with the sampling methods and address any further research you would conduct.
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Chapter 19 / Exercise 19.10
Engineering Fundamentals: An Introduction to Engineering
Moaveni
Expert Verified
26. Define the following terms All answers are in glossary of my Online text. 27. A study claims more than 60% of students text-message frequently. In a poll of 1000 students, 660 students said theǇ teǆt ŵessage fƌeƋueŶtlǇ. CaŶ Ǉou suppoƌt the studǇ’s Đl aim? Conduct the test with = 1%
28. 15 I-pod users were asked how many songs were on their I-pod. Here are the summary statistics of that study: 200 650 s X a. CaŶ Ǉou suppoƌt the Đlaiŵ that the Ŷuŵďeƌ of soŶgs oŶ a useƌ’s I -pod is different from 500? Conduct the test with = 5% .
b. Can you support the claim that the population standard deviation is under 300? Conduct the test with = 5% .
29. Consider the design procedure in the test you conducted in Question 28a. Suppose you wanted to conduct a Power analysis if the population mean under Ha was actually 550. Use the online Power calculator to answer the following questions.