Solve the problems Consider the following data on the number of subscribers (in millions) of the top 20 cable video networks in the US for 1994. 2 43.6 45.0 47.5 49.2 51.0 54.5 55.4 56.0 57.3 58.0 58.3 59.0 59.4 60.0 60.2 61.3 62.0 62.1 62.6 69.6 a. Determine the mean and standard deviation of the data. b. Determine the three quartiles and median of the data.
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.
Solve the problems
Consider the following data on the number of subscribers (in millions) of the top
20 cable video networks in the US for 1994.
2
43.6 45.0 47.5 49.2 51.0 54.5 55.4 56.0 57.3 58.0
58.3 59.0 59.4 60.0 60.2 61.3 62.0 62.1 62.6 69.6
a. Determine the mean and standard deviation of the data.
b. Determine the three
c. Calculate the coefficient of skewness of the data and comment on the
skewness of the data.
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