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Compute the probability that exactly only 2 kids are sick Compute the probability that at least 2 kids are sick.
The distribution of the amount of money in savings accounts for Florida residents has an average of 2,200 dollars and a standard deviation of 900 dollars. Suppose that we take a random sample of 100
Suppose 13% of American adults believe that the highest priority of America is to protect freedom of speech. We will take a random sample of 200 American adults and ask them the question. Then the s
The distribution of the amount of money in savings accounts for University of Miami students has an average of 1,100 dollars and a standard deviation of 1000 dollars. Suppose that we take a random s
If the pH level of the reservoir is ok, the results at each location will have varying results, with an average pH of 8.5 and a standard deviation of 0.22. If the pH level of the reservoir is ok, wh
If np is greater than or equal to 15 and n(1-p) is greater than or equal to 15, what is the approximate shape of the sampling distribution of the sample proportion?
Twenty-nine percent of Americans say they are confident that passenger trips to the moon will occur in their lifetime. You randomly sample 200 Americans and ask if they believe passenger trips to th
Suppose 13% of American adults believe that the highest priority of America is to protect freedom of speech. We will take a random sample of 20 American adults and ask them the question. Then the sa
Suppose 60% of American adults believe Martha Stewart is guilty of obstruction of justice and fraud related to insider trading. We will take a random sample of 20 American adults and ask them the qu
If a set of observations contains an extreme value and none of the observations repeat themselves, the most representative measure of central tendacy is the
If other factors are held constant, which of the following sets of data is most likely to satisfy the homogeneity of variance assumption?
Let X be binaomial with parameters n = 15 and p = .2 a) Find the expression for the density for X b) Find the expression for the moment generating function for X
Describe how to determine if a hypothesis test is one-tailed or two-tailed and explain how you know where to shade the critical (rejection) region. Give an example of each with the null and alterna
One sample of n = 8 scores has a variance of s2 = 6 and a second sample of n = 8 scores has s2 = 10. If the pooled variance is computed for these two samples, then the value obtained will be
c. Test the hypothesis using the critical value approach. d. Test the hypothesis using the p-value approach. Construct and interpret the 90% confidence interval
Find the pdf of U = X/[X + Y], the proportion of time that the machine is in operation during any one operation-repair cycle. Use the pdf of U to find the probability that U is greater than 0.75.
Suppose X has a geometric distribution with success probability, 1/3. Determine the probability distribution of Y = X/(X+1) that is provide the possible values of Y and its probability mass function
There is a certain disease in America which is very rare. The probability of a person having the disease is 1 in 100,000,000. Assume that there are 310,000,000 people in the US.
The wolf pack needs to kill 3 large animals in order to feed the whole pack. What is the probability that it will need to chase 20 large animals to feed the pack? What is the expected number of chas
You are picking a bouquet of 20 flowers for your mother at random from a garden with 25 coneflowers, 35 daisies and 42 lilies. Your mother likes daisies the best and you want to have 15 of those in
Customers arrive at a bakery at an average rate of 6 per half-hour. Each customer spends an average of $2.50. What is the probability that exactly 3 customers will arrive in the next 10 minutes?
Approximately 8.33% of men are colorblind. You survey 8 men from the population of large city and count the number who are colorblind. What is a "success" in this situation and what is probability o
James teaches a class of 300 students, and only 6 have done their homework assignment which is due today. He calls on a student at random to put a problem on the board and check to see whether he or