Refer to the accompanying data set and use the 25 home voltage measurements to construct a frequency distribution with five classes. Begin with a lower class limit of 127.0 volts, and use a class width of 0.2 volt. Does the result appear to have a normal distribution? Why or why n E Click the icon to view the data. Complete the frequency distribution below. - X More Info Voltage (volts) 127.0 - 127.2 127.2- 127.4 127.4-127.6 127.6-127.8 127.8-128.0 (Type integers or decimals rounded to the nearest tenth as needed Frequency Voltage Measurements From a Home Home Home Full Day (volts) Day (volts) Day (volts) Day (volts) data 22 127.8 set 23 127.9 24 127.2 127.4 Home Home 8 127.3 15 127.7 9 127.0 10 127.6 11 127.5 12 127.8 13 127.5 20 127.3 21 127.3 127.0 1 127.6 16 17 3 127.4 127.5 18 127.6 127.8 6. 127.2 25 19 4 127.1 7 127.1 127.8 127.6 127.1 14 Print Done
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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