Fall 2014 Math 302 Quiz 4 - Quiz 4 MATH302 Return to...

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Quiz 4 MATH302 Return to Assessment ListComment: Eric, Very good job. You did pretty well. Spend a little more time working on this material, and next time, you will make an A. Therefore, keep at it, and you will do well. Sincerely, Vince Part 1 of 3 - 10.0/ 11.0 PointsQuestion 1 of 201.0/ 1.0 PointsA manufacturer of flashlight batteries took a sample of 13 batteries from a day’s production and used them continuously until they failed to work. The life lengths of the batteries, in hours, until they failed were: 342, 426, 317, 545, 264, 451, 1049, 631, 512, 266, 492, 562, and 298. At the .05 level of significance, is there evidence to suggest that the mean life length of the batteries produced by this manufacturer is more than 400 hours? A.Yes, because the test value 1.257 is less than the critical value 2.179B.No, because the test value 1.257 is greater than the critical value 1.115C.No, because the p-value for this test is equal to .1164D.Yes, because the test value 1.257 is less than the critical value 1.782Answer Key: C
Question 2 of 201.0/ 1.0 PointsSmaller p-values indicate more evidence in support of the:
Question 3 of 201.0/ 1.0 PointsThe hypothesis that an analyst is trying to prove is called the:
Question 4 of 201.0/ 1.0 PointsYou conduct a hypothesis test and you observe values for the sample mean and sample standard deviation when n = 25 that do not lead to the rejection of H0. You calculate a p-value of 0.0667. What will happen to the p-value if you observe the same sample mean and standard deviation for a sample size larger than 25?
Question 5 of 200.0/ 1.0 PointsResults from previous studies showed 79% of all high school seniors from a certain city plan to attend college after graduation. A random sample of 200 high school seniors from this city reveals that 162 plan
to attend college. Does this indicate that the percentage has increased from that of previous studies? Test at the 5% level of significance. State the null and alternative hypotheses. A.H0: p = .79, H1: p ≠ .79B.H0: p .79, H1: p > .79C.H0: = .79, H1: > .79D. : = .79, H1: > .79Answer Key: B

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