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1.Medical tests were conducted to learn about drug-resistant tuberculosis. Of 142 cases testedin New Jersey, 9 were found to be drug-resistant. Of 268 cases tested in Texas, 12 were foundto be drug-resistant. Do these data suggest a statistically significant difference between theproportions of drug-resistant cases in the two states? Use a .02 level of significance. What is the p-value, and what is your conclusion?
Nationwide, the average time until a electric utility customer service representative answers a call is 260 second. The Gigantic Kilowatt Energy Company randomly sampled 30 calls and found that, on average, they were answered in 227 second with a ..
A professional basketball player ins averaging 21 points per game. he will be retiring at the end of this season. The team has multiple options to replace him.
Compute the projected profit for the order quantities suggestedby the management team under three scenarios: worst case in whichsales = 10,000 units, most likely case in which sales = 20,000units.
To test the difference between two means using two mean z test.
Our bodies have a natural electrical field that is known to help wounds heal. Does changing the field strength slow healing? A series of experiments with newts investigated this question.
What is the probability that a new cup will overflow when filled by the automatic dispenser? At what value should the mean amount dispensed by the machine be set to satisfy this wish?
Find the probability that a randomly selected x-value from the distribution is in the given interval. Between 29 and 37.
What is an example of data that can be transformed from one level of measurement to another, and another example of data that cannot be transformed?
What is the value of the population mean? What is the best estimate of this value?
People in a large population average 60 inches tall. You take a random sample and will be given a dollar for each person in your sample who is over 65 inches tall.
They both want to know what family member typically does the research about possible honeymoon destinations, and who primarily makes the decision on selecting the destination.
They plan to set up a radar trap and check the speeds of 80 randomly selected cars. Can this distribution be approximated by a normal curve?
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