Percentage of observations of random variable
The standard normal table shows an area value of 0.8 for a z-score of 0.84. What percentage of the observations of a random variable that is normally distributed will be more than 0.84 standard deviations above the mean?
a. 8%
b. 16%
c. 20%
d. 84%
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For the test of equal population means versus unequal population means, the absolute value for the computed test statistic, the critical values, and the p-value respectively are:
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The value of the linear correlation coefficient is reported by an investigator to be 0.55. Based on this statistic we can conclude that: 55% of the variability in the predictor can be explained by the variability in the response
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