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An article reported that a survey of clothing worn by pedestrians killed at night in traffic accidents revealed that about 80 percent of the victims were wearing dark- colored clothing and 20 percent were wearing light-colored clothing. The conclu- sion drawn in the article was that it is safer to wear light-colored clothing at night.
(a) Is this conclusion justified? Explain.
(b) If your answer to part (a) is no, what other information would be needed before a final conclusion could be drawn?
Gives the exact chance the total time is more than 16 minutes. 5) 6.14 Comment on the shape, what distribution is a reasonable t? 6) 6.30 Comment on the shape, same as the stef and leaf?
the distrubution with parameter thetacedil has pdf fy theta1thetae-ytheta where 0ltxltinfinity and thetagt0.find1. the
Illustrate what is the probability all four calls are infact emergencies. Illustrate what is the probability that three or more calls are not emergencies.
for a t random variable with 5 degrees of freedom find a such that pt gt a .975. answer to three decimal places and
If you take the mean weights for random groups of 10 adults and form a new distribution, how will this new distribution compare to distribution of individuals?
A student conducted a study on the height and weight of adult males. She collected data from 40 adult males and found that average height is 68.34 inches with a standard deviation of 14.02 inches
1.students at university x must be in one of the class ranks freshman sophomore junior or senior. at university x 35 of
The hypothesis that the samples came from identical populations cannot be rejected, the T value is 16.5 greater that the lower limit.
If its weekly cost function is C(x)=68,000+150x, how should the manufacturer set the size of the rebate in order to maximize its profit?
a company that manufacturers coffee for use in commercial machines monitors the caffeine content in its coffee. the
To conclude the effect of a new fertilizer on productivity of tomato plants one group of plants is treated with the new fertilizer as a second group is grown without such treatment. The number of ripe tomatoes produced by each group is counted.
a gummball machine has just been filled with 50 black 150 white 100 red and 100 yellow gum balls that have been
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