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The following is a portion of a classic data set called the "pilot plot data" in Fitting Equations to Data by Daniel and Wood, published in 1971.
The response y is the acid content of material produced by titration whereas the regress or X is the organic acid content produced by extraction and weighing.
(a) Plot the data; does it appear that a simple linear regression will be a suitable model?
(b) Fit a simple linear regression; estimate a slope and intercept.
(c) Graph the regression fine on the plot in(a).
an urn contains 7 red marbles and 3 white marbles. three marbles are drawn from the urn one after the other. find the
During the past year, the mean sales of Wshington Reds in cases was 45,000 cases, and the standard deviaiton was 4,450. How many cases of Washington Reds should be brought to market? Assume the sales follow a normal distribution.
If we assume a normal distribution of Diastolic blood pressures, then between what two values can we be assured 99.7% of all Diastolic blood pressures will lie?
For a given level of significance, if the sample size is increased: the power of the test will increase we will have more responses to log and calculate it will skew the mean to the right it has no effect on the direct results.
Find the critical value for a right-tailed F-test when alpha=.05 the degrees of freedom for the numerator (d.f.N.) are 15, and the degrees of freedom for the denominator (d.f.N.) are 21.
a sample of 4 telephones is selected from a shipment of 20 phones. there are 5 defective telephones in the shipment.
Determine and evaluate the effect size and comment on the impact of proposed difference. Ask yourself and comment on your level of satisfaction with the "practical" significance of the findings.
In the past an autoobile repair shop owner has noticed that sales increased ats certain economic indicators decreased. Calculate the expected sales increase and the standard deviation.
Are all the events in this distribution mutually exclusive? Describe in detail.
which of the following statements best describes the meaning of estimation in statistics?estimation determines the most
an advocacy group is investigating whether gender has an effect on job category in large investment firms. given the
a shipment of 20 tv tubes contains 16 good tubes and 4 defective tubes. three tubes are chosen successively and at
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