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Performance scores on a motor skills task form a normal distribution with μ = 20 and σ = 4. A psychologist is using this task to determine the extent to which increased self-awareness affects performance. The prediction for this experiment is that increased self-awareness will reduce a subject's concentration and result in lower performance scores. A sample of N = 16 subjects is obtained, and each subject is tested on the motor skills task while seated in front of a large mirror. The purpose of the mirror is to make the subjects more self-aware. The mean score for this sample is = 15.5. U a one-tailed z test with α = .05 to test the psychologist's prediction (include all elements as detailed in z-Test Handout).
a teacher gives a reading skills test to a third-grade class of n 25 at the beginning of the school year. to evaluate
If the number of trials during each experiment is 12, determine the maximum likelihood estimate for the probability of success, p.
a television sports commentator wants to estimate the proportion of citizens who follow professional football. complete
explain why it is possible to observe a strong relationship between 2 variables based on the value of eta-squared
How many pairs of each type of ski should the company manufacture each day in order to maximize profit if a pair of downhill skis yields a profit of $10.
You are given the following information on two types of photocopying machines. The Exone has a fixed cost of £400 per annum and a running cost of £20 per 1000 copies.
An online site presented this question, "Would the recent norovirus outbreak deter you from taking a cruise?" Among the 34, 123 people who responded, 63% answered "yes." Use the sample data to construct a 95% confidence interval estimate for the p..
Rutgers University researchers surveyed 71,300 undergraduate students between Fall 2012 and Spring 2013 semesters to study the extent of student-admitted
a researcher notes that the correlation in the group she studies is so large that if there were not a correlation among
Testing for defectives. Suppose a lot of 5 items contains two defective items. The items are tested one by one in random order.
Complete the exercise to determine if one store is better than the other in terms of mean family grocery price using a = .05. Clearly tell which is better if you decide this is appropriate.
As the teacher when situation like the above take place describe what would you say to guide children using effective communication and conflict resolution strategies. Be sure to respond based on the content
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