Estimate the proportion of undecided voters
How large a sample is needed to estimate the proportion of undecided voters in the presidential elections if you wish this proportion to be within 0.032, using a confidence level of 0.97, in the most recent survey this proportion was 0.20?
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An investigator hypothesizes which cholesterol levels in children might be affected by educating their parents on proper nutrition and exercise.
Determine equivalent annual cost of every alternative: Equivalent Annual Cost Quick & Dirty? Do-It-Right? ii) Which system must Blooper install? Quick & Dirty or Do-It-Right.
In a random sample of 50 customers out of 400 customers, the average amount spent on groceries was $65.60. Assuming a population standard deviation of $8.50, set up a 90 percent confidence interval for the average amount spent on groceries.
A sample of 15 pairs of X and Y values produces a correlation of +0.47. For alpha = 0.05 (two-tailed) can we conclude that there is a non-zero correlation between X and Y in the population? Why/why not?
Police at SUU (Small Unnamed University) have got the report that the student was skateboarding in hall. As it turns out, exactly 1 person committed crime and all students are lying. Find who is guilty party?
Two registers in the microprocessor are read at random times which are statistically independent. Each register is read once. If the time at which each register is read is uniformly distributed from 0 to 30 ms, determine the probability that the r
A student should answer 43 or more questions correctly to obtain a grade of A. What percentage of the students who have done their homework and attended lectures will obtain a grade of A on this multiple-choice examination (to 2 decimals)?
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