CritEek is a website where fans of horror films go to write movie reviews. On the website's home page there is a display of the number of movies review selection of the site's top critics. The histogram below summarizes the data. Use the histogram to answer each of the questions. Frequency (Number of critics) 10- 9. 8. 7. 4- 3- 2- 1- 15 to 22 Number of movie reviews 7 to 14 23 to 30 31 to 38 39 to 46 (a) One class is the most frequent. How many critics are in this class? (b) How many critics have 22 or fewer movie reviews? (c) What is the class width?
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.
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