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Assignment:
Fair Coin? In a series of 100 tosses of a token, the proportion of heads was found to be 0.61. However, the margin of error for the estimate on the proportion of heads in all tosses was too big. Suppose you want an estimate that is in error by no more than 0.03 at the 90% confidence level.
(a) What is the minimum number of tosses required to obtain this type of accuracy? Use the prior sample proportion in your calculation.You should toss the token at least ? times.
(b) What is the minimum number of tosses required to obtain this type of accuracy when you assume no prior knowledge of the sample proportion? You should toss the token at least ? times.
In an article in the Journal of Management, Morris, Avila and Allen studied innovation by surveying firms to find the number of new products introduced by the firms.
Use a 5 % level of significance to test the hypothesis that the average weight is 300 grams. Use the p-value test to check your answer.
a fair coin is tossed independently five times i.e. pheads ptails 0.5what is the probability ofa all headsb no headsc
Hypothesis test for the difference between two means - Assume the population standard deviations are not the same. At the 0.05 significance level, is there a difference in the mean waiting time?
Suppose there is no cyclical component. Quarterly billing for water usage is shown below describe summer billing for year 5.
Four unsuspecting drivers take their autos to the station for inspection on four different days and randomly select one of the two teams. If all four cars are new and in excellent condition, what is the probability that three of the four will be re..
A researcher finds a correlation between self esteem and shyness is -0.50, which is significant for his sample. Interpret this correlation.
Suppose five balls are distributed into three urns according to the Bose-Einstein scheme. Find the probability that at least one urn contains three or more balls.
Odometers measure automobile mileage. How close to the truth is the number that is registered? Suppose 12 cars traveled exactly 10 miles.
Same as the previous option, except not using his lifeline on the 10th question, and instead applying it to the 11th question.
Select a US citizen and a citizen of China at random, independently of one another. Determine the probability that both have type O blood?
What is the probability that more than 265 will be relieved of the nasal condition?
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