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Question: Binomial setting? A binomial distribution will be approximately correct as a model for one of these two settings and not for the other. Explain why by briefly discussing both settings.
(a) When an opinion poll calls residential telephone numbers at random, only 20% of the calls reach a person. You watch the random digit dialing machine make 15 calls. X is the number that reach a person.
(b) When an opinion poll calls residential telephone numbers at random, only 20% of the calls reach a live person. You watch the random digit dialing machine make calls. Y is the number of calls needed to reach a live person.
The average cost per night of a hotel room in San Francisco is $550 with a standard deviation is $150 based on a sample of 50 hotel room rates.
an automatic hopper car loader is set to put 75 tons of coal into each car. the actual weights of coal loaded into each
What is the purpose of statistical estimation? What statistics do you find most useful in regression analysis? Why?
Five sprinkler systems are installed in a laboratory. In the event of a fire the probability of each one working properly is 0.95. If a fire should occur what is the probability thatall 5 sprinklers will be activated.
This indicates that about 80 out of 100 similarily constructed intervals would include the population porportion. (true or false)
the following table shows ceremonial ranking and type of pottery sherd for a random sample of 434 sherds at a location
the entrance exam at a university is normally distributed with a mean of 520 and a standard deviation of 75. if only
Given this Analysis of Variance information for three treatments each with six observations.with SST =1116, SSE=1068, SSTotal =2184. What is the mean square for treatments?
The chance that all 50 residents in a neighborhood end up being the sample of residents selected is: the population of the suburb divided by 50.
The faces are equally likely and the two rolls are independent. What is the average (mean) intelligence for such characters? How spread out are their intelligences, as measured by the standard deviation of the distribution?
Construct a scatter plot for these data.- Find the estimated regression line. Add a graph of the estimated regression line to the scatter plot in part (a).
At the 10% level of significance, is there sufficient evidence to indicate that more books are being loaned out per day, on the average?
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