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Statistics Answers

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An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 150 lb and 201 lb. The new population of pilots has normally distributed weights...

A department store wants to sell eight purses that cost the store $40 each and 32 purses that cost the store $10 each. If all purses are wrapped up in forty identical boxes and if each customer picks...

Set no. :- 1,  2 , 3 no.of data:- 9 ,12 , 15  mean value :- 8 , 7 , 9  standard deviation:- 1.6 , 1.2 , 1.4  Considering all the data sets together , the overall...

7. A population has a mean of 85 and SD of 9. If many samples of size n = 100 are randomly drawn from the population, approximately what proportion of the sample means fall between 84 and 86? Explain...

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