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The iron content of slag can be estimated magnetically, or measured chemi cally. The magnetic method is quicker and easier, but the chemical method is more precise. Five slag samples are measured both ways.
(a) Use the data given below to estimate the linear relationship between Y = chemical yield and x = magnetic measurement.
Magnetic: 22 19 25 21 28
Chemical: 24 21 25 23 25
(b) Estimate a2 and explain what it measures in the context of this prob lem.
(c) Plot the residuals from the linear model against the magnetic readings and comment on the model.
In past elections, the representative received 40 percent of the popular vote in that area of the state. She doubts whether it has changed much. How many registered voters should be sampled?
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How would you explain to another student the difference between compound interest and continuous compound interest to a friend?
1. when performing a hypothesis test and the population standard deviation is known what is the p-value for a
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question the marketing manager of a larger supermarket chain would like to use shelf space to predict the sales of pet
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assume that a random sample is used to estimate a population p. find the margin of error e that corresponds to the
A subject is just guessing has probability .25 of guessing correctly on each card. What is the probability of exactly 5 correct guesses?
in pharmacological research a variety of clinical chemistry measurements are routinely monitored closely for evidence
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