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A coin is tossed until obtainning a head or tossing it up to three times, whatever happens first. If X represent the number of times that the coin is tossed,
1. what are the possible values that the random variable X will asume?
2. draw the tree diagram for this experiment.
3. complete the table below that represents the probabilities for each of the values that the random variable X will asume.
To forecast attendance at an yearly tennis tournament a model has been developed that uses attendance from the previous year and the amount spent for advertising this year.
A regression equation was computed to be Y= = 35 + 6X. The value of the 35 indicates that:
Serum cholesterol levels were taken from a population of 10,000 college students. The results were normally distributed. Males had a mean of 195 and a standard deviation of 10. Females had a mean of 185 and a standard deviation of 12.
In an article in the Journal of Management, Morris, Avila and Allen studied innovation by surveying firms to find the number of new products introduced by the firms.
why the rise in performance on IQ tests contrasts with a steady decline in performance over the past decades on many standardized tests,
Microfracture knee surgery has a 75% chance of success on patients with degenerative knees. The surgery is performed on 5 patients. Find the probability of the surgery being successful on less than 3.
The quality control engineer for a furniture manufacturer is interested in the mean amount of force necessary to produce cracks in stressed oak furniture.
What is meant by illusionary correlations? Why is it so difficult for individuals to disprove their beliefs in correlations that are actually false?
In a bottling process, a manufacturer will lose money if the bottles contain either more or, less than is claimed on the label. The quality manager of a plant is interested in testing whether the mean ounces of catsup per family size bottle differ..
Find a z score for which the area under the standard normal curve from -z to z is 50%. (b) Find the range of scores which will be assigned a grade of C.
Critically discuss some examples of descriptive statistics? Why are they used in research? What is a confidence interval?
A doctor wants to know if there is a relationship between a father’s weight and his first newborn son’s weight. Perform a hypothesis test at Alpha = .01, using table I
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