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1. Calculate the sample size needed given these factors:
2. Calculate the sample size needed given these factors:
3. In a few sentences, describe two designs that can address your research question. The designs must involve two different statistical analyses. For each design, specify and justify each of the four factors and calculate the estimated sample size you'll need. Give reasons for any parameters you need to specify for G*Power.
A recent study of cardiovascular risk factors reports that 30% of adults meet the criteria of hypertension. if 15 adults are assessed, what is the probabiliy that?
SAT I scores around the nation tend to have a mean scale score around 500, a standard deviation of about 100 points and are approximately normally distributed. A person who scores (a perfect) 800 on the SAT I has approximately what percentile rank..
Calculate the correlation coefficient and determine whether it is statistically significant using a two-tailed test at the .05 level.
a large university is interested in the outcome of a course standardization process. they have learned that 150
What is the probability that in a sample of 10 pieces: 5 or more will be defective?
a computer receives input over a slightly faulty connection. for a particular transmission 80 of the bits sent consists
We are intersted in the number of students who prefer brand C cola. identify the distribution of the random variable and the mean,standard deviation.
The confidence interval estimate of the population mean will be __________ for a 95% confidence level than for a 90% confidence level. Narrower or Wider?
The topic I am treating now is based on using qualitative analysis based on grounded theory to investigate the topic "Mature student studying at University".
Determine the probability of exactly one success given Poisson distribution with mean of 2.0.
Statistics practice questions answers in a correct order and if possible copy all the graphs in excel. How large a sample size (trading days) is needed to estimate the population mean number of shares traded per day to within 100 million with 95% co..
How large a sample should be selected in order to estimate the population proportion to within a margin of error of 0.02 with 97% confidence. The sample proportion from the preliminary sample was 0.18.
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