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Case: A student randomly guesses on multiple choice exam (and hence independence between each question can be assumed). There are four questions, each question has five options. Let ?? be the random variable for the number of correct guesses.
1. Write the distribution for ??.
2. Determine the probability of answering exactly 3 questions correctly.
3. Determine the probability of answering at most 2 questions correctly.
4. Determine the expected number of correct guesses (long run average of the correct guesses), and the variance of number of correct guesses.
A researcher has gathered data from seven randomly selected correctional employees on the number of years (X) the employees have worked
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The file SUV contains the overall miles per gallon (MPG) of 2015 small SUVs: 26, 22, 24, 26, 21, 28.
The authors of the article "Predicting Professional Sports Game Outcomes from Intermediate Game Scores" (Chance, 1992: 18-22) used a chi-squared test to determine whether there was any merit to the idea that basketball games are not settled until ..
MoE's concessions manager believes the average amount that mall customers spend on food during a visit has increased over the historical average of $18.75, due to the opening of some new upscale restaurants in the mall. Use the data in the file to..
In the previous exercise you analyzed the association between the amounts of fat and sodium in fast food hamburgers. What about fat and calories?
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A researcher hypothesizes that there will be a significant change in a student's fear of statistics following participation in an intervention designed to increase students' confidence in their ability to successfully complete a statistical course..
Calculate basic descriptive statistics and interpret their meaning in applLearning Outcomes - Explore and apply different levels of measurements, as well as understanding independent/dependent variables in research scenarios.
a pharmaceutical company is testing a new chemical compound that can be used to detect the presence of a disease. in
For which values of i (i = 1,2, 3) is the posterior probability that the item was produced by machine Mj larger than the prior probability that the item
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