105 CONFIDENCE INTERVAL FOR µ WHEN o IS UNKNOWN 117 112 Given the accompanying sample data, use Excel's formula options to find the 90% confidence interval for the population mean. Assume that the population is normally distributed. 148 144 106 124 Complete the following analysis. Do not hard code values in your calculations. 137 128 Confidence Coefficient 0.9 133 Sample Size n 20 107 df 19 123 a/2 108 0.05 106 138 Lower Limit of Confidence Interval Compute the lower limit of the confidence Interval using A1:A20, E10, E11, 121 129 Upper Limit of Confidence Interval Compute the upper limit of the confidence Interval using A1:A20, E10, E11 30 102 141
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.
Given the accompanying sample data, use Excel’s formula options to find the 90% confidence interval for the population mean. Assume that the population is
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 4 images
