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It is desired to characterize the precision of two instruments used to measure the density of a liquid stream in a re?nery's distillation column. Ten measurements of a calibration sample with known density 0.85 gm/cc are shown in the table below.
Instrument 1 Measurements
Instrument 2 Measurements
0.864
0.850
0.858
0.916
0.855
0.861
0.764
0.866
0.791
0.874
0.827
0.901
0.849
0.836
0.818
0.953
0.747
0.733
0.846
Consider these data as random samples from two independent normal populations; carry out an appropriate test to con?rm or refute the hypothesis that instrument 2 is less precise than instrument 1.
If you choose a customer at random, then find the probability that the customer-was new and paid in cash.
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when testing h0u gt u0 using confidence intervals if u is not contained in the confidence interval then we would a.
Using a 2-month weighted moving average, with weights of 2 for the most recent month and 1 for the previous month develop forecasts sales for March to June inclusive.
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If a randomly chosen US household earns over 250, 000 per year, what is the probability it is from California?
a horizontal cylinder is heated electrically. the cylinder is supplied with a current at a dc voltage. using the data
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Your bakery produces loaves of bread with '1 pound' written on the label. Here are weights of randomly sampled loaves from today's production:
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