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Sample size calculation
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Questions (67)
A private medical clinic wants to estimate the true mean annual income of its patients. The clinic needs to be within $500 of
3 answers
asked by
Lorie
540 views
A private medical clinic wants to estimate the true mean annual income of its patients. The clinic needs to be within $100 of
3 answers
asked by
Jason
515 views
A pilot sample of 50 measurements of the breaking strength of cotton threads gave S_(pr) = 18 grams. Determine the sample size
2 answers
asked by
Zabe
491 views
Given the following information, determine the sample size needed if the standard time estimate is to be within 5 percent of the
1 answer
asked by
Brenda
463 views
Approximately how many research participants would be required for 80% power for a
study using the t test for dependent means
1 answer
asked by
Anonymous
471 views
About how many participants are needed for 80% power in each of the following planned studies that will use a t test for
2 answers
asked by
Maria
496 views
What sample size is required from a very large population to estimate a population proportion within
0.05 with 95% confidence?
1 answer
asked by
dean
499 views
need to explain how i obtain the sample size which is 370 here's the rest of the information i don't know how to writ this out?
c
1 answer
asked by
Anoymous
470 views
A simple random sample of kitchen toasters is to be taken to determine the mean operational lifetime in hours. Assume that the
1 answer
asked by
Anonymous
446 views
About how many participants are needed for 80% power in each of the following planned studies that will use a t test for
1 answer
asked by
Maria
448 views
A political candidate has asked you to conduct a poll to determine what percentage of people support her.
If the candidate only
1 answer
asked anonymously
37 views
You want to obtain a sample to estimate a population mean age of the incoming fall term transfer students. Based on previous
1 answer
asked anonymously
13 views
You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 25 bacteria reveals a
1 answer
asked anonymously
28 views
Using Cochran’s formula, at 95% confidence and 50% prevalence, to calculate sample size
1 answer
asked anonymously
4 views
Marissa plays in a softball league. She wants to know about how many players in the league also plays a basketball because there
1 answer
asked anonymously
5 views
What is the minimum sample size needed in order to use normal approximations for an estimate about a population, given a
5 answers
asked anonymously
4 views
Assuming that sample proportion is 0.35, what sample size is needed to have a 5% margin of error and 99% confidence?(1 point)
1 answer
asked anonymously
2 views
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Parent Categories (15)
Confidence Interval
Confidence interval estimation
Confidence intervals
Data Analysis
Estimation
Hypothesis Testing
Placebo-Controlled Trial
Sampling
Sampling and Estimation
Sampling Methods
Statistical Estimation
Statistics
Study Design
Survey Design
Surveys