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When calculating Pearson's Chi-square statistic for the association of two nominal variables, we can construct a contingency table that breaks the data down into k x l categories, where k and l are the number of categories for each nominal variable. For example, one variable describes vaccinated or unvaccinated (2 categories) and one describes whether participants contracted the disease or not (2 categories). So the contingency table is broken into 4 groups: vaccinated and diseased; vaccinated and healthy; unvaccinated and diseased; unvaccinated and healthy.
To calculate the chi-squared statistic, we must know the observed and expected values for these kxl categories. What does the expected value represent?
Select one:
a. The total of one category in the cell divided by the total of the other category in that cell.
b. The expected value if there is full association between the two nominal variables.
c. The expected value if there is no association between the two nominal variables.
d. The expected value if the total sample size is equally divided by the number of groups.
If 36 of these repair bills are randomly selected, find the probability that they have a mean cost between 271 dollars and 273 dollars.
The station is now in the middle of a program break. What is the probability that the switchboard will be overloaded during the next minute?
A part is produced with a mean of 6.2 ounces and a standard deviation of 0.2 ounce. What is the probability that the weight of 100 such items is between 6 l6 and 624 ounces?
An unknown distribution has a mean of 45 and a standard deviation of eight. Samples of size n = 30 are drawn randomly from the population.
Write down the probability distribution of your repayment. Compute the expected value of your repayment or the "mean repayment".
The manufacturer has to replace or exchange 10% of its model I and 18% of its model II. If a model is selected at random, find the probability that it will be defective?
x the quality of the speed of executiony overall satisfaction with electronic trades provided the estimated regression
Explain what is meant by subjective probability. Research the Internet, and provide a business-related example in which subjective probability assessment would likely be used (be sure to cite your sources).
a) What is the probability that the person will receive job offers from all three companies? b) What is the probability that the person will receive a job offer from Company B only? c) What is the probability that the person will receive a job offer ..
the blood pressure measurements of a single patient were taken by twelve different medical student and the results are
Given the corporate ethical breaches in recent times, assess whether or not you believe that the current business and regulatory environment is more conducive to ethical behavior. Provide support for your answer.
What is the expected value for this random variable? Answer to one decimal place if necessary
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