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In a batch of 8,000 clock radios 9% are defective. A sample of 15 clock radios is randomly selected without replacement from the 8,000 and tested. The entire batch will be rejected if at least one of those tested is defective. What is the probability that the entire batch will be rejected?
Do the data indicate any significant preferences among the three versions of the photograph? Test at the .05 level of significance.
Shows a sample mean of 1,261 with a standard deviation of 59. Should Pennsylvania adopt the new system for all toll roads in the state?
A random sample of 17 wolf litters in Ontario, Canada gave an average of x1= 4.9 wolf pups per litter, with estimated sample standard deviation s1 - 1.0.
The quality-control inspector checks 200 pieces in a certain operation. The piece is either good or defective. The record for nine hours.
While some teenagers received no allowance, others reported receiving $200 per week. Based on this information, the mean allowance for U.S. teenagers is most likely.
if 50,000 parts are produced, how many would you expect to fail to meet a minimum specification limit of 35lb tensile strength? How many would have a tensile strength in excess of 48lb?
The following table contains t0 new sub- oups of thickness data. Plot this data on the control charts from (a) based on the new subgroup size. Is the process in statistical control?
A letter is drawn 1,000 times, at random, from the word A R AB I A. There are two offers. (A) You win a dollar if the number of A's among the draws is10 or more above the expected number. (B) You win a dollar if the number of B's among the drawsis 10..
Linear programming problems. Computethe following linear programming problem. Among which of the following points (X,Y) is feasible.
What are the assumptions of regression analysis and how do you evaluate them?
A mean of 400 labour hours and a standard deviation of 100 labour hours. What is the probability that the bridge gets constructed between 350 and 450 hours?
A sample of 40 observations is selected from one somewhat normal population. The sample mean is 102 and the sample standard deviation is 5.
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