John wants to know whether a commonly prescribed drug does improve the attention span of students with attention deficit disorder (ADD). He knows that the mean attention span for students with ADD who are not taking the drug is 2.3 minutes long. His sample of 12 students taking the drug yielded a mean of 4.6 minutes. John can find no information regarding σx, so he calculated s² x =1.96. e. Conduct the hypothesis test (Do the math and compare the t-critical and t-obtained values). f. State your conclusions in terms of Ho (Should you reject the Ho or fail to reject/accept the Ho). g. Based on your analysis, is there a relationship between the drug and attention span.
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.
John wants to know whether a commonly prescribed drug does improve the attention span of students with attention deficit disorder (ADD). He knows that the
e. Conduct the hypothesis test (Do the math and compare the t-critical and t-obtained values).
f. State your conclusions in terms of Ho (Should you reject the Ho or fail to reject/accept the Ho).
g. Based on your analysis, is there a relationship between the drug and attention span.
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