A safe number to consider is .5, which would mean that the sample size has to be that large. Calculating Sample Size To calculate the sample size, you need the following parameters. Z-score: The Z-score value can be found here. Standard deviation Margin of error Confidence level To ...
Answer to: For a population with a mean of 60 and a standard deviation of 24, find the z-score corresponding to a mean of 63 for a sample of n = 36...
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z=X−X¯S Answer and Explanation:1 Here, we have to implement the z-score formula given the sample mean and the sample standard deviation: z=X−X¯S Here are... Learn more about this topic: Z Score | Definition, Equation & Examp...
The z-score is the number of standard deviations a given proportion is away from the mean. To find the correct z-score to use in your calculation, refer to this table: Desired Confidence Interval Z-score 80% 1.28 85% 1.44 90% 1.65 95% 1.96 99% 2.58How...
In the sample size formula, the Z score is determined based on the confidence level. Z-score is a numerical measurement used to describe a value's relationship to the mean of a group of values. Z-score is measured in terms of standard deviations of values from their mean. How Is Slovin...
(ME) and a z-score (z) of 1.96, our formula for sample size translates from: sample size = (z^2 * (p(1-p)))/ME^2 to sample size = (1.96^2 * (0.5(1-0.5)))/0.05^2. Working through the equation, we move to (3.84160.25)/0.0025 = 0.9604/.0025 = 384.16. Since you are...
Z = How many standard deviations a data point is when compared to the population mean. Standard Deviation (σ) = Used in statistics to determine how dispersed data is compared to the average. Mean (μ) = Shows the average score for the characteristic being measured in a certain group, like...
Cochran’s Sample Size Formula Yamane’s Sample Size Formula Known Confidence Interval and Width (unknownpopulation standard deviation). Known Confidence Interval and Width (knownpopulation standard deviation). Find a sample size to estimate a population mean ...
N = population size • e = Margin of error (percentage in decimal form) • z = z-score The z-score is the number of standard deviations a given proportion is away from the mean. To find the right z-score to use, refer to the table below:...