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The price-earnings ratios of a sample of stocks have a mean value of 13.5 and a standard deviation of 2.If the ratios have a bell shaped distribution,what can we say about the proportion of ratios that fall between
a.11.5 and 15.5?
b.9.5 and 17.5?
c.7.5 and 19.5?
Quality
The degree to which a product, service, or process is free from defects, deficiencies, and significant variations, measured against agreed standards or specifications.
Degree of Freedom
In statistics, it refers to the number of values in the final calculation of a statistic that are free to vary.
Group Means
The average values obtained from the data points of each group or category under examination in a study.
Statistical Significance
Indicating that the observed results are unlikely to occur by chance alone, according to a predetermined threshold of probability.
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