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Consider the following pairs of observations:
a. Construct a scattergram for the data.
b. Use the method of least squares to fit a straight line to the seven data points in the table.
c. Plot the least squares line on your scattergram of part a.
d. Specify the null and alternative hypotheses you would use to test whether the data provide sufficient evidence to indicate that x contributes information for the (linear) prediction of y.
e. What is the test statistic that should be used in conducting the hypothesis test of part d? Specify the degrees of freedom associated with the test statistic.
f. Conduct the hypothesis test of part d using α = .05.
Let X be a normal distributed random Variable with u=100 and o=10. the probability that X is between 70 and 100 is:
For an independent-measures ANOVA comparing three treatments with a sample of n = 5 in each treatment, what is the critical value for the F-ratio using a = .05?
The Tycron Company produces three electrical products-clocks, radios, and toasters
Compute the coefficient of determination for bone loss and women's age and describe what this statistic means.
At the .05 level of significance, is there convincing evidence that the number of absences per employee has increased?
The structure of a two factor study can be presented as a matrix with levels of one factor determining the rows and the levels of the second factor determining the columns. With this structure in mind, describe the mean differences that are evalua..
The average number of acres burned by forest and range fires in a large Wyoming county is 4,300 acres per year, with a standard deviation of 750 acres. The distribution of the number of acres burned is normal.
In a shipment of steel bars, 2 out of every 100 sets are defective. A construction company makes a purchase of 500 bars selected at random from the manufacturer's production. If x is the number of defective bars purchased by the company, identify ..
Florida consumers are confident about the economy. verify the 90% confidence interval. State in a sentence the meaning of the derived confidence interval .494, .568. What would be your conclusion?
a major issue facing many states is whether to legalize casino gambling. suppose the governor of one state believes
Neckwarmers. Mountainside Fleece sold 40 Neckwarmers. Solid-color neckwarmers sold for $9.90 each and print ones sold for $12.75 each.
It has been known from the past experience that two percents of your emails are spam. Suppose you will receive 200 emails. Find the mean and variance of the number of spam emails among those
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