For the following observed and expected frequencies: Observed 9 22 53 9 7 Expected 15 20 40 15 10 a. Compute the value x square. b. How many degrees of freedom are there? c. Test the hypothesis that the distribution of the observed frequencies is as given by the expected frequencies. Use the a=0.01 level of significance.
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.
For the following observed and expected frequencies:
Observed 9 22 53 9 7
Expected 15 20 40 15 10
a. Compute the value x square.
b. How many degrees of freedom are there?
c. Test the hypothesis that the distribution of the observed frequencies is as given by the expected frequencies. Use the a=0.01 level of significance.
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