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Changing Multiple-Choice Answers
When Told Not to Do So One of the authors wanted to determine the effect of changing answers on multiple-choice tests.
She studied the tests given by another professor, who had told his students before their exams that if they had doubts about an answer they had written, they would be better off not changing their initial answer.
The author went through the exams to look for erasures, which indicate that the first choice was changed. In these tests, there is only one correct answer for each question. Do the data support the view that students should not change their initial choice of an answer?
If the basket ball player is a 74% free throw shooter, then, on average, how many free throws will he or she make in a game with eight free throw attempts?
Can these results be used to prove that the NSF study overestimated the proportion of foreigners in U.S. laboratories?
The world incidence of (frequency of world population having) diabetes is 5%. If 20 persons are chosen at random, what is the probability that no more than 3 have the disease
A total of 61,647 people responded to an Elle/ MSNBC.com survey. It was reported that 50% of the respondents were women and 50% men.
association we know association does not imply causation but what does this mean in your own words. provide and discuss
a. What is the independent variable and what are its levels? What is the dependent variable? b. Is this a between-groups or within-groups design? Explain.
Find a confidence interval for the mean assuming that each sample is from a normal population. Mean = 127, s = 27, n = 16. Find the 90% Confidence Interval.
find solutions to the following problem. be sure to include all relevant information including hypothesis critical
Use the normal approximation to the binomial with acorrection for continuity.
Locate the most recent data from the Annual Survey of Hours & Incomes (ASHE) in either the Annual Abstract of Statistics or on the website at http://www.ons.gov.uk.
cupid is doing research about relationships between heterosexual humans heights and whether they couple up and get
Insulating Fluid. Which would you use to predict the log breakdown time for a batch of insulating fluid which is to be put on test at 30 kV.
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