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An oil co. is drilling some wells. the results are described as either a dry well or a producer well. Past experience suggests that 10% of exploratory wells are producer wells. If the company drills 12 wells, what is the probability that all 12 wells are producer wells?
What is the probability that all 12 wells are dry wells?
What is the probability distribution for the number of dry wells?
Suppose that you perform a significance test regarding a population mean and that the evidence does not warrant rejection of the null hypothesis.
Determine whether the description corresponds to an observational study or an experiment. Thirty university students are divided into two groups, one group receives free tutoring in mathematics, the other does not.
Why do we have so many several measures of central tendency? Are all really essential or do they essentially give same information?
A biologist has found that the average weight of 12 randomly selected adult mud turtles is 8.7 lb. with standard deviation 3.6 lbs. Construct a 99% confidence interval for the population mean weight of adult mud turtles.
Using a level of significance of .10, is there evidence that the population mean weight of the candy bars is greater than 7.3? Fully explain your answer.
Suppose the Doctor would be content with 95% confidence. How does the decrease in confidence affect the sample size required?
Calculate a 90% CI for the population proportion of Americans who believe there is intelligent life on other planets.
Support colour-coding on packaged food to indicate healthier options
Do you think that these types of statistics can ever be accurate? How could this statistic be biased? In what ways could scientists misinterpret the results of their studies and come up with an incorrect statistic? What are your thoughts?
Find the probability that fewer than 10 of those sampled currently have access to online services.
To guarantee that cans of soda are properly filled, some cans are sampled and the amounts measured. The overall average for the samples is 12 ounces.
What purpose does a multiple regression analysis serve? Give an example of how it might be used in marketing research.
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