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The president of a bank is attempting to arrange a meeting with the three vice presidents for a friday weekly meeting. he believes that each of these three busy individuals, independently of the others, has about 40% chance of being able to attend the meeting. What is the probability that at least two fo the three vice presidents can attend the meeting?
the president of a bank is attempting to arrange a meeting with the three vice presidents for a friday weekly meeting. he believes that each of these three busy individuals, independently of the others, has about 40% chance of being able to attend the meeting. What is the probability that at least two fo the three vice presidents can attend the meeting?
Perform a significant test to assess whether there is an association between mortality from cirrhosis of the liver and duration of employment in the group hired after 1945. Report a p-value.
Suppose the probability of a boy being born is the same as the probability of a girl being born. Find the probability that a family with three children will have two boys and one girl.
What is the value of the sample mean resonance frequency? The confidence level for one of these intervals is 90% and for the other it is 99%. Which is which, and how can you tell?
Automatic sensors to watch for lightening in a sample of 10 square kilometers. What are the mean and standard deviation of x, the mean number of strikes per square kilometer?
The estimated miles per gallon ratings of a class of automobiles are normally distributed with a mean of 12.8 and a standard deviation of 3.2. What is the probability that one of these automobiles selected at random would get:
Ccompute a t-test comparing males' and females' heights. You must determine which type of t-test to compute. Write a short interpretation of the results.
Be sure to show whether you use the t- or z- value, and what value you use. Interpret the confidence interval in a single sentence. In another sentence, state why you used either the "t" or the "z".
A psychology professor is interested in whether implementing weekly quizzes improves student learning. She decides to use the weekly quizzes in one section of her introductory psychology class and not to use them in another section of the same cou..
HIV found that 3 received a false positive test result. Test the researcher's claim of a 2% false positive rate at the a = 0.05 level. What can you conclude?
Using the data file below, construct a histogram and a frequency polygon. Describe the shape of this distribution.
The residents play both shuffleboard and poker, find the probability that a resident plays poker, given that they garden (that is, find P(poker | garden).
Construct a 90% confidence interval for the true mean weight. What sample size would be necessary to estimate the true weight with an error of plus or minus .03 grams with a 90% confidence?
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