Calculate the value of the point estimate that was used to determine the endpoints of the confidence interval. 2. Calculate the margin of error for this confidence interval
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.
Computers in some vehicles calculate various quantities that are related to performance. On such quantity is the vehicle’s fuel efficiency (in miles per gallon). For a certain vehicle, the fuel efficiency was recorded on
20 randomly selected days. The resulting 95 percent confidence interval for this vehicle’s mean fuel efficiency was determined to be (41.1, 45.2).
1. Calculate the value of the point estimate that was used to determine the endpoints of the confidence
interval.
2. Calculate the margin of error for this confidence interval
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