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A fair die is rolled 36 times. Find out the standard deviation of even number (2, 4 or 6) outcomes?
a.18
b.6
c.4
d.3
Statistics and Probability, Statistics
A new Study provides some evidence that playing action video games strengths a person's ability to translate sensory information into accurate decisions. Researchers had 23 male volunteers with an average age of 20 look ...
1. A successive independent survey design and a longitudinal survey design both examine changes in responses over time. How do they differ in their approach? 2. Distinguish between demographic and epidemiological researc ...
Ron and Veronica need to choose a name for their newborn daughter. After giving the matter much thought, they have narrowed the list of possible names to four: Abigail, Iris, Irene, and Olga. They now must choose one nam ...
An IQ test is designed so that the mean is 100 and the standard deviation is 16 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be ...
1. What is validity? 2. Distinguish between face validity, construct validity, and criterion-related validity. In general, which kind of validity is least important to researchers? 3. Can a measurement procedure be valid ...
In randomized, double-blind clinical trials of a new vaccine, monkeysmonkeys were randomly divided into two groups. Subjects in group 1 received the new vaccine while subjects in group 2 received a control vaccine. After ...
Romeo composes a letter to Juliet, and gives it to Tybalt to deliver to Juliet. While on the way, Tybalt peeks at the letter's contents. Tybalt gives Juliet the letter, and Juliet reads it immediately, in Tybalt's presen ...
The historical context of England in 1215 with the costs of King Richard the Lionheart's ransom and the crusades. What were the nobles' complaints? How did the nobles' interests differ from the king's interest? What inte ...
A company manufactuirng compter chip finds that 8% of all chips manufactured are defective. Management is concerned that high employee turnover is partially responsible for the high defect rate. In an effort to decrease ...
Two pollsters are conducting surveys to estimate the proportion of Clarkston, Michigan citizens who support a bond issue to build a sports stadium. Both pollsters use the same methods; however, their sample sizes differ. ...
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