The lives (in hours of continuous use) of 100 randomly selected flashlight 6.95 - 7.45 2 7.45 - 7.95 8 batteries are: 7.95 - 8.45 21 8.45 - 8.95 35 8.95 - 9.45 18 9.45 - 9.95 13 9.95 - 10.45 3 a. Find the mean of the battery lives. (Type an integer or a decimal. Round to two decimal places.) |hrs b. Find the standard deviation of the battery lives.O hrs (Type an integer or a decimal. Round to two decimal places.)
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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