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A brand name has a 60% recognition rate. Assume the owner of the brand wants to verify that rate by beginning with a small sample of 6 randomly selected consumers. What is the probability that exact
comparing the response times between 2 cab companies. companies A and B were each called at 50 randomly selected times. the calls to company A were independently made from the calls to company B.a
A couple both carry a recessive gene for albinism, meaning the probability of any child being albino is ¼. The couple plans to have 4 children.
A consumer analyst collected the following data on the screen sizes of popular LCD televisions sold recently at a large retailer: a. Does there appear to be a linear relationship between the screen s
A fast food arrives at a fast drive through rest restaurant 6 minutes after it opens and then the arrival times for the next four customers in order are 3minutes, 8 minutes, 2 minute,
Studies find that students who drink more tend to have lower grades. Therefore, drinking leads to poor student performance.
Describe, briefly, your observational study or experiment and state your hypotheses. What do you think is the correlation of the variables and why.
Suppose that you roll 2 dice and consider the sum of the two. Let A be the event of throwing odd, B be the event of throwing 4 or less and C be the event of throwing a multiple of 3.
A federal report find that a lie detector test given to truthful persons have a probability of 0.2 of suggesting that the person is deceptive.
What are the null hypothesis and the alternative hypothesis? Should the office building purchase the new brand of florescent bulbs? (i.e. test your hypothesis using a z-test)
During the weekends the airline customer center opens at 8: 00 am. An airline customer arrives 5 minutes after the customer center opens and then the interarrival times for the next four customers i
In a laboratory experiment, data were gathered on the life span (Y in months) of 33 rats, units of daily protein intake (X1), and whether or not agent X2
A sample of n = 16 scores is obtained from an unknown population. The sample has a mean of M = 46 with SS = 6000. a. Use the sample data to make an 80% confidence interval estimate of the unknown popu
On which test did he do better relative to the rest of the class? Please explain in a sentence or two your reasons for your choice.
Your boss would like you to suggest changes that could be made to the project that would significantly shorten it. What would you suggest?
If a random sample of size 2 is observed, demonstrate that a UMP test of size 0.10 for the above test exists. Also decide the form of the rejection region.
A random sample of 200 students at UCLA shows that 120 of them have internet access. Test the claim that the true population proportion of students at UCLA who have internet access
A survey asked tax accounting firms their business form (S = sole proprietorship, P = partnership, C = corporation) and type of risk insurance they carry (L = liability only, T = property loss only,
A financier whose specialty is investing in comedy shows has observed that, in general, shows with "big- name" stars seem to generate more revenue than those shows whose stars are less well known
What is the 99% confidence interval for the difference between the two school's scores. (For consistency, let the difference d=A-B.)??? b. Suppose we want to perform a two-tailed test where H0 is tha
What is the value of b1 in the regression Y=b0+b1X? (Hint: what is SSR and how is that related to b1?)???? c. Suppose the answer to part b is b1=4 (it is not, but to avoid compounding any mistakes,
Your company sells exercise clothing and equipment on the internet. To design the clothing, you collect data on the physical characteristics of your different types of customers.
Find the probablity that the number that say would feel secure is (a)exactly five (b)more than five (c)at most five
What is the expected cost to make the new aircraft? What is the cost X to build the aircraft for which the probability of exceeding X is 0.02?
Formulate the problem to a LP model to help Suzie plan production over the three quarters to minimize the combined production and inventory holding cost. Suppose there is no inventory at the beginni