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Twelve school photographs (all the same size) are placed in random order face down on a table. Two of them are of identical twin boys. One of the twins is brought into the room and asked to select a photograph.
a. What is the probability that he will select his own by chance?
b. What is the probability that he will select his own or his brother's?
c. If he is asked to select 2 photographs, what is the probability that he will select his own and his brother's?
Describe the "third variable problem" as it relates to correlation and provide an example of how you might see this played out in your own field.
consider 50 independent flips of a coin having probability 0.4 of landing on heads. we say that a changeover occurs
Epidemiologists are researching the relationship between two levels of tobacco exposure and a positive diagnosis of esophageal cancer. With SPSS, use the data set bd1.sav and the variables tob2 (dichotomized smoking status)
a federal report find that a lie detector test given to truthful persons have a probability of .2 of suggesting that
Find out annual break-even volume for the Rolling Creek Textile Mill.
Compare the old schedule that includes overtime on weekends for the regular workers to the new schedule. How much is the company saving?
Log transform a variable... if the values are too big. if the residuals (error) get bigger for bigger values of the variable.
Calculate a 95% Confidence Interval
Show that if X1 has a binomial distribution with parameters n1 and p, if X2 has a binomial distribution with parameters n2 and p, and X1 and X2 are independent
A sample of 400 individuals participated in the taste test and 80 indicated they like the taste. At a 5% significance level, test to determine if at least 22% of the population will like the new soft drink.
Data for this and subsequent samples, each consisting of 25 square feet of canvas, are shown on the next page. Use an appropriate 3-sigma control chart in determining whether the process is in control.
Several companies have been developing electronic guidance systems for cars.- Is there evidence to conclude that the Motorola electronic guidance system is superior to that of the German competitor?
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