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Statistics

Archaeopteryx is an extinct beast having feathers like a bird but teeth and a long bony tail like a reptile. Five fossil specimens have preserved both the femur and humerus bones. The measurements (in centimeters) for each bone are given below. Femur 38 56 59 64 74 Humerus 41 63 70 72 84 Femur 38 56 59 64 74 Humerus 41 63 70 72 84 Scientists are interested in determining if there is a strong relationship between two lengths of the two bones so that they might be persuaded that the five specimens belong to the same species. The Minitab output for regression is provided below. MINITAB--Regression The regression equation is humerus = -3.66 +1.20*femur Predicto... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

4350

OTA ID:

103060

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Regression Interpretation

A manufacturer of a new type of home insulation wants to develop guidelines for builders and consumers regarding the effects on natural gas consumption (1) of the thickness of the insulation in the attic of the home and (2)of the outdoor temperature. In the laboratory they varied the insulation thickness and temperature. A few of the findings were: Monthly Natural Thickness of Outdoor Gas Consumption Insulation Temperature (cubic feet) (inches) (degrees F) Y X1 X2 30.3 6 40 26.9 12 40 22.1 8 49 Based on the results, the ... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

4372

OTA ID:

103058

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Regression Interpretation: Testing a Hypothesis.

In a multiple regression equation two independent variables are considered, and the sample size is 25. The regression coefficients and the standard errors are as follows. b1=2.676-----sb1=0.56 b2=-0.880----sb2=0.71 Conduct a test of hypothesis to determine whether either independent variable has a coefficient equal to zero. Would you consider deleting either variable from the regression equation? Use the 0.5 significance level.

Subject:

Statistics

Topic:

All Topics

Posting ID:

4373

OTA ID:

102454

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Statistics

A tire company made a sampling distribution on one of its brands of tires and determined that the tire had a mean life of 56,000 miles with a standard deviation of 18,100 miles. a. What is the probability that the life of a single tire will be less than 50,000 miles? b. What is the probability that the mean life of a sample of 100 tires will be less than 50,000 miles? c. The company also wants to give a reasonable warranty on this tire, yet protect itself so that the company won't have to replace more than 9% of the tires. What guaranteed lifetime (in miles) should the company state in its advertisements for the tire

Subject:

Statistics

Topic:

All Topics

Posting ID:

4396

OTA ID:

103059

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Statistic Problem

It is estimated that the probability that the general population will live past their 85th birthday is 5.4%. Use the standard normal distribution to approximate this Binomial problem and answer the following questions. Out of a sample of 600, what is the probability that fewer than 30 will live beyond their 85th birthday?

Subject:

Statistics

Topic:

All Topics

Posting ID:

4412

OTA ID:

103060

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