In a survey of 380 households regarding the ownership of HD TVs and non-HD TVs, the following data was obtained: 350 households own one or more HD TVs. 160 households own one or more HD TVs and one or more non-HD TVs. 18 households do not own a HD TVs or a non-HD TVs. How many households only own one or more non-HD TVs?
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.
In a survey of 380 households regarding the ownership of HD TVs and non-HD TVs, the
following data was obtained:
350 households own one or more HD TVs.
160 households own one or more HD TVs and one or more non-HD TVs.
18 households do not own a HD TVs or a non-HD TVs.
How many households only own one or more non-HD TVs?
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