A survey asked chief executives at leading U.S. firms the following question: "Where do you expect the U.S. economy to be 12 months Trom now?" A representative sample of their responses appears below: Better Same Same Worse Worse Better Better Worse Better Better Better Same Better Worse Same Better Same Same Worse Same Same Better Better Same Worse Click here for the Excel Data File a-1. Construct frequency and relative frequency distributions that summarize the responses to the survey. (Do not round intermediate calculations. Round "Relative Frequency" to 2 decimal places.) Relative Expectation Frequency Frequency Better Same Worse
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.
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