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Approximating Standard deviation based on Z score.
A population of scores has p = 44. In this population an X value of 40 corresponds to z = - 0.50. describe what is the population standard deviation?
1) 2
2) 4
3) 8
4) 6
Statistics and Probability, Statistics
1. What does the error of estimation tell us about the results of a study conducted using probability sampling? 2. What happens to the error of estimation as one's sample size increases?
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Using the confidence interval when conducting a two-tailed test for the population proportion p, we reject the null hypothesis if the hypothesized value for p falls inside the confidence interval.
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