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Sample Size Calculation using unknown population proportion and known margin of error.
A market research firm wants to estimate the level of recognition of a particular consumer product within a range of ± 3% with 95% confidence. How many individuals will it need to sample to achieve this level of accuracy and confidence?
Analysis of data sets assignment
When combining probabilities, to find the probability of one event AND another event, the separate probabilities should be:
One approach would be to contact every psychology graduate student you know and ask them to fill out a questionnaire about it.
The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 3.0. Assume 36 golfers played the course today. Find the probability that the average score of the 36 golfers exceeded 71.
What IQ score should one have in order to be eligible for Mensa?
Find out a 95 percent confidence interval for population mean.
Cores on two tests have a bivariate normal distribution; and that correlation of 2 scores is 0.8. Determine the probability that sum of the student's scores on 2 tests will be greater than 200?
At the .05 significance level, is the number of units produced on the afternoon shift larger?
Develop a joint probability table for these data. If a student goes full time, determine the probability that school quality is first reason for selecting a school?
Calculate a 3-month moving average forecast for months 4 through 9 also Compare the two forecasts by utilizing MAD. Which forecast appears to be more accurate.
If a worker is chosen at random, what is the probability that he or she.Is very improbable to switch jobs. Is somewhat likely or very likely to switch jobs.
How many commercials' worth of data do I need to have a margin of error no more than 3, the correct set of hypotheses
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