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In a certain community, 20% of the families own a dog, and 20% of the families that own a dog also own a cat. It is also know that 28% of all the families own a cat.
What is the probability that a randomly selected family owns both a dog and a cat?
What is the conditional probability that a randomly selected family owns a dog given that it doesn't own a cat?
If the researcher used an independent-measures design, then how many individuals were needed for the study and what are the df values for the F ratio?
in a university statistics course a correlation of -0.8 was found between numbers of classes missed and course grade.
If you select a random sample of 16 customers: what is the probability that the mean time spent per customer is at least 3 minutes?
a) How is it possible that the minimum of the 365 values is 0 inches and the median is also 0 inches? b) Describe the distribution as symmetric, left-skewed or right-skewed.
an article in the american statistician m. l. r. ernst et al. scatterplots for unordered pairs 50 1996 pp. 260-265
Parole board is examing five prisoners up for parole. let x= number of prisoners out of 5 on parole who become offenders. Find the probability distribution for x.
Using the least squares coded method, determine the equation for the straight line going through the earnings. Project, using the equation for the average hourly earnings for the year 1990
Calculate the mean of the 20 samples and draw a histogram showing the 20 sample means and describe the distribution of the x-bars that you see in part b (shape of distribution, center, and the amount of dispersion).
in a large lecture course the scores on the final examination followed the normal curve closely. the average score was
What would you recommend to Mary Smith, and why - Mary Smith is the Manager of Market Intelligence for Acme Automotive Accessories (AAA) Corporation, a $500 million manufacturing company traded on the NYSE.
Can the college conclude that the students in the new program are significantly different from the rest of the freshman class? Use a two-tailed test with a .O5.
If the probability of making a two point shot is greater than the probability of making a three point shot, why do coaches allow some players to shoot the three point shot if they have the opportunity? Use expected value to explain your answer.
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