XR04-05 The number of items rejected daily by a manufacturer because of defects was recorded for the past 30 days. The results are as follows. 17 11 6 21 25 21 8 17 22 19 18 19 14 6 21 20 25 19 9 12 16 16 10 29 24 a Construct a histogram. b Construct an ogive. c Describe the shape of the histogram.
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.
XR04-05 The number of items rejected daily
by a manufacturer because of defects was
recorded for the past 30 days. The results
are as follows.
17 11 6 21 25 21 8 17 22 19 18 19 14
6 21 20 25 19 9 12 16 16 10 29 24
a Construct a histogram.
b Construct an ogive.
c Describe the shape of the histogram.
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