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We know the general construction for a 95% confidence interval for a one-sample proportion. If we know that our observed proportion is 0.35, what sample size (n) is needed to attain a confident interval length of 0.25? Round to the nearest whole number.
The Pew Research Center reports that they are only able to contact 76% of randomly selected households drawn from telephone surveys.
Sex and violence. In June 2002, the Journal of Applied Psychology reported on a study that examined whether the content of TV shows influenced the ability
Give some examples. What are your recommendations on creating passwords for your various user accounts on the internet?
The article "Multimodal Versus Unimodal Instruction in a Complex Learning Environment" (J. of Experimental Educ., 2002: 215-239) described an experiment carried out to compare students' mastery of certain software learned in two different ways.
Using the t tables, software, or a calculator, estimate the critical value of t for a 90% confidence interval with df = 17.
Do the successive digits in the decimal expansion of p behave as though they were selected from a random number table (or came from a computer's random number generator)?
She surveys 100 randomly selected families and finds the mean income to be $96,321 with a standard deviation of $9555.With a0.05, is she correct?
Classify each of the following as nominal, ordinal, interval, or ratio data. The number of tickets sold at a movie theater on any given night.
Poisson Distribution to Calculate Unscheduled Flight Arrivals
What is the probability that the average score of the sample will be greater than 80 but less than 87?
Customers arrive at a counter in accordance with a Poisson process of density three arrivals per minute. (a) What is the expected number of arrivals per minute?
What percentage of batches is likely to be outside the specification in the long run - From the sample, does it seem that the population mean is on target?
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