Jump to level 1 Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation is 6 inches. The heights of 7 randomly selected students are 68, 65, 63, 73, 67, 61 and 60.
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.
![CHALLENGE
6.2.1: Confidence intervals for population means.
АCTIVITY
Jump to level 1
Suppose the mean height in inches of all 9th grade students at one high school is
estimated. The population standard deviation is 6 inches. The heights of 7
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randomly selected students are 68, 65, 63, 73, 67, 61 and 60.
T = Ex: 12.34
Margin of error at 99% confidence level = Ex: 1.23
%3D
99% confidence interval = [ Ex: 12.34 Ex: 12.34 ]
[smaller value, larger value]
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