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The t-table has entries for areas of 0.10,0.05,0.025,0.01, L0.005. In contrast, the x2-table has entries for those ar¬eas and for 0.995, 0.99, 0.975, 0.95
In 2005 there were 43,443 fatalities in the United States as a result of motor vehicle crashes. The pie chart at the right shows the national distribution
Salaries An employment information service says that the standard deviation of the annual salaries for public relations managers is at least $14,500
How do you use the chi-square distribution to test if a frequency distribution fits a claimed distribution?
Computer abuse by employees is an ongoing worry to businesses. A study revealed the data shown in the chart below.
An insurance company has two divisions, auto and property. Total annual claims, X, in the auto division follow a normal distribution with mean 10
After reading about how the ANOVA is used, and the value many researchers place on it, describe a situation, preferably from your work place
Cars arrive at a toll booth at a mean rate of 5 cars every 10 minute according to poisson process
When and how do you use a chi-square distribution to test if two variables are independent? Also, provide an example showing how to use the contingency table
Calculate a chi-square statistic and compare it with the critical value to determine whether or not GPA is significantly related to another of the factors
High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours
Determine the decision rule - the critical value of the test statistic.
To investigate the phenomenon of "home team advantage" a researcher recorded the outcomes from 64 college football games on one Sat.
A study suggested that personality type is related to heart disease. Specifically, type A people,who are competitive, driven, pressured, and impatient
A bar owner is interested in customer preference for three (3) different brands of beer: Molson's, Corona, and Guinness
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location.
A professor teaching introductory psychology gave 25 As, 35 Bs, 60 Cs, 30 Ds, and 20 Fs to 170 students in her class
Research results suggest that IQ scores for boys are more variable than IQ scores for girls (Arden & Plomin, 2006).
A sample of the reading scores of 25 sixth-graders has a mean of 82, and the standard deviation of the sample is 15
To see whether students who finish an exam first get the same grades as those who finish later, a professor kept track of the order in which papers were handed
A study indicated where different age groups primarily get their news: At the 0.05 level of significance, is there evidence of a significant relationship
In a particular market there are three commercial television stations, each with its own evening news program from 6:00 to 6:30
One study looked at of 234 magazines. Two pieces of information were collected on each -- its cover price and whether it continued to be published.
Each year, the National Highway Traffic Safety Administration (NHTSA) together with the National Center for Statistics and Analysis (NCSA)