Chapter 4 Uperalions UlI Jels 11. The thrifty habit among teenagers is influenced by their families, society and mass media. 80 teenagers participate in a survey. It is found that 30 teenagers are influenced by their families, 15 teenagers are influenced by their families and society, 9 teenagers are influenced by society and mass media, 7 teenagers are only influenced by their families, and 3 teenagers are influenced by all the three factors. The ratio of the teenagers who are influenced by society only to the teenagers influenced by mass media only is 3: 1. Calculate the number of teenagers who are influenced by (a) two factors, which are their families and mass media only. (b) mass media only. (c) society.
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.
Step by step
Solved in 2 steps with 1 images
