A survey recorded the number of children 18 years old or younger who lived in 200 households. The following table shows the results: Number of Children Number of Families 0 88 1 40 2 42 3 20 4 7 5 3 a. Determine the mean number of children per household. b. Determine the standard deviation for the number of children per household.
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.
A survey recorded the number of children 18 years old or younger who lived in 200 households. The following table shows the results:
Number of Children Number of Families
0 88
1 40
2 42
3 20
4 7
5 3
a. Determine the mean number of children per household.
b. Determine the standard deviation for the number of children per household.
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