university health officials are interested in determining the average number of hours of sleep undergraduates get during a week of classes. a randomly selected 200 undergraduates and asked the number of hours they sheri during a school week. which one of the following types of graphs should not be used to display this data? a. pie chart b. histogram c. dot plot d. stemplot 2. a class of 35 elementary students took an exam worth 50 points. the standard deviation of the score was 0. what must be true? a. there was an error in the calculation for standard deviation b. everyone scored 50 points c. everyone received the same score d. the mean, median, and mode must all be 0
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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