Pts question 23 many companies that manufacture

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2 / 2 ptsQuestion 23Many companies that manufacture lightbulbs advertise their 60-watt bulbs ashaving an average life of 1000 hours. A cynical consumer bought 30 bulbsand burned them until they failed. He found that they burned for an averageof M= 1233, with a standard deviation of s= 232.06. What statistical testwould this consumer use to determine whether the average burn time oflightbulbs differs significantly from that advertised?single-sample t teststandard deviation analysis
11/8/19, 3:01 PMExam 3 (Chapters 8-11): PSYC-2317-004Page 14 of 27dependent-samples ttestztest
2 / 2 ptsQuestion 24The correct formula for the upper bound of a confidence interval for a single-sample ttest is:
2 / 2 ptsQuestion 25The critical cutoffs for a two-tailed, paired-samples ttest with sevenparticipants at a plevel of 0.01 are:
11/8/19, 3:01 PMExam 3 (Chapters 8-11): PSYC-2317-004Page 15 of 272 / 2 ptsQuestion 26Aplevel of 0.05 corresponds to a confidence interval of _____%.
2 / 2 ptsQuestion 27A psychologist is interested in whether working memory is influenced bysleep loss. The psychologist administers a measure of working memory totwo groups of subjects. The subjects in one group were kept awake for theentire night and the subjects in the other group maintained their normal sleepschedules. Which statistical analysis should be performed to answer thequestion “Does sleep loss affect working memory?”single-sample t testztestpaired-samples ttestindependent-samples ttest
11/8/19, 3:01 PMExam 3 (Chapters 8-11): PSYC-2317-004Page 16 of 272 / 2 ptsQuestion 28A study found statistically significant results for a hypothesis tested with anindependent-samples ttest. The author of the study reported her effect sizefor the test as 1.24. What is true of the two sample means?
2 / 2 ptsQuestion 29Checking an independent-samples ttest for the assumption of normality ispart of step _____ of the six steps.
11/8/19, 3:01 PMExam 3 (Chapters 8-11): PSYC-2317-004Page 17 of 272 / 2 pts

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