Lisa is conducting a study to determine how well Memphians have recovered from the recession. Her sample consists of 1,000 Memphis residents. She knows from census data that the mean household income in Memphis is $32,285 with a standard deviation of $5,645. However, her sample mean is only $31,997 with a standard deviation of $6,005. Calculate the standard deviation of the sampling distribution (i.e. the standard error of her sample
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.
Lisa is conducting a study to determine how well Memphians have recovered from the recession. Her sample consists of 1,000 Memphis residents. She knows from census data that the mean household income in Memphis is $32,285 with a standard deviation of $5,645. However, her sample mean is only $31,997 with a standard deviation of $6,005.
Calculate the standard deviation of the sampling distribution (i.e. the standard error of her sample
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