Use the following stem-and-leaf plot to recover the original data. Then create a frequency histogram starting at 0 and with a class width of 10. You can use StatCrunch to make the histogram and copy it to your worksheet or draw it out by hand. Either way, make sure to label the x-axis Test Scores. Do there appear to be any outliers? Explain. Variable: Test Scores Decimal point is 1 digit(s) to the right of the colon. Leaf unit = 1 1 : 2 2 : 3 : 4 : 557 5 : 168 6 : 07 7 : 4789 8 : 00399 9 : 6 10 : 1
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.
Classwork 2
Use the following stem-and-leaf plot to recover the original data. Then create a
frequency histogram starting at 0 and with a class width of 10. You can use StatCrunch to make
the histogram and copy it to your worksheet or draw it out by hand. Either way, make sure to
label the x-axis Test Scores. Do there appear to be any outliers? Explain.
Variable: Test Scores
Decimal point is 1 digit(s) to the right of the colon.
Leaf unit = 1
1 : 2
2 :
3 :
4 : 557
5 : 168
6 : 07
7 : 4789
8 : 00399
9 : 6
10 : 1
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