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According to an online survey by Harris Interactive for job site CareerBuilder.com (lnformationWeek.com, September 27, 2007), more than half of IT workers say they have fallen asleep at work. Sixty-four percent of government workers admitted to falling asleep on the job. Assume that the following contingency table is representative of the survey results.
a. Specify the competing hypotheses to determine whether sleeping on the job is associated with job category.
b. Compute the value of the test statistic.
c. Approximate the p -value.
d. At the 5% significance level, can you conclude that sleeping on the job depends on job category?
In 2006 the same question posed to 811 teens found 41% reporting such checks. Do these results provide evidence that more parents are checking?
The liquid chlorine added to swimming pools to combat algae has a relatively short shelf life before it loses its effectiveness. Records indicate that the mean shelf life of a 5-gallon jug of chlorine is 2,10 hours (90 days).
A financial analyst is interested in estimating the average amount of a foreign loan by U.S. banks. The analyst believes that the amount of a loan may.
A cheerleading squad received a mean rating (out of 100 possible points) of 75 ± 12 (!l ± cr) in competitions over the previous three seasons.
Perform a two tailed hypothesis test on both the legal services satisfaction and the sentence satisfaction variable's data using a 0.5 significance level by creating a null and a alternative statement.
A certain type of tomato seed germinates 90% of the time. A backyard farmer planted 25 seeds. What is the probability that exactly 20 germinate?
A metropolitan school system consists of two districts- north and south. the north district contains 60% of all students, and the south district contains 40% of all students.
A sample of n = 25 scores has a mean of M = 40 and a variance of s2 = 100. If this sample is being used to test a null hypothesis stating that m = 43, then what is the t statistic for the sample?
When testing two populations with small sample sizes, do both sample sizes have to be identical? Why or why not?
Refer to Exercise, in which one or more third variables are at least partially likely to account for the observed relationship between religious activities.
Find the probability that this shuttle component functions successfully if n = 2. - Find the probability that this shuttle component functions successfully if n = 4.
Wind power. Should you generate electricity with your own personal wind turbine? That depends on whether you have enough wind on your site.
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