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32 votes
32 votes
A roadrunner is a desert bird that tends to run instead of ny. While running, the roadrunner uses its tail as a balance. A sample of 10 roadrunners was taken, and the birds' total length, in centimeters (cm), and tail length, in cm, were recorded. The output shown in the table is from a least-squares regression to predict tail length given total length Coef 1.281 Term Constant SE Coef 2.673 Total Length0.5264 00467 Suppose a roadruner has a total length of 59.0 cm and tail length of 31.1 cm. Based on the residual, does the regression model overestimate or underestimate the tail length of the roadrunner? (A) Underestimate, because the residual is positive. (B) Underestimate, because the residual is negative. (C) Overestimate, because the residual is positive (D) Overestimate, because the residual is negative. (E) Neither, because the residual is 0. For each 27. The histograms show the results of three simulations of a sampling distribution of a sample mean. simulation, 1,500 samples of size m were selected from the same population and the sample mean was The value of n was different for each of the three simulations Graph C Graph A Graph B 200 0. Sample Means 200 200 Sample Means Sample Means Which of the following is the correct ordering of the graphs from least value of n to greatest value of n ? (A) A, C,B (B) B. A, C (C) B, C, A (D) C. A, EB (E) C. B, A cimately normal age of

User Roland Studer
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27 votes
27 votes

Final answer:

The hypothesis test is a test of one mean with the null hypothesis being that the population mean time for long-term marathon runners is 15 years.

Step-by-step explanation:

The hypothesis test described in question 48 is a test of one mean. The null hypothesis for this test is that the population mean time for long-term marathon runners is 15 years, while the alternative hypothesis is that it is not equal to 15 years.

User Nucleartux
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