Recently I abandoned my AT&T unlimited data plan because it was costing way too much for what I felt like I was using. I switched to a plan that gives me 3GB of data per month and I figure that if I keep my average daily data usage under 100MB, then I will be fine. To estimate my daily usage I randomly select 28 days and find that, on those days, I have an average data usage of 89.8 MB with a standard deviation o
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.
Recently I abandoned my AT&T unlimited data plan because it was costing way too much for what I felt like I was using. I switched to a plan that gives me 3GB of data per month and I figure that if I keep my average daily data usage under 100MB, then I will be fine. To estimate my daily usage I randomly select 28 days and find that, on those days, I have an average data usage of 89.8 MB with a standard deviation of 63.9MB.
Round your answer to the nearest tenth of a MB
1)Use the information provided to construct a 90% confidence
must use the confidence interval estimate
a) the margin of error, b) the critical number used, and c) the parameter being estimated (p or μ).
2) Does the evidence seem to support my hope that I am keeping my average daily data usage under 100MB.
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