Independent random samples of n1= 500 and n2= 500 observations were selected from binomial populations 1 and 2, and x1= 120 and x2= 147 successes were observed. a. What is the best point estimator for the difference (p1-p2) in the two binomial proportions? b. Calculate the approximate standard error for the statistic used in part a. c. What is the margin of error for this point estimate?
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
Independent random samples of n1= 500 and n2= 500 observations were selected from binomial populations 1 and 2, and x1= 120 and x2= 147 successes were observed.
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