Answered: The Ed2 Ο 6.12 5.5 5.25 6 7 Ο

Math

Statistics

The Ed2 Ο 6.12 5.5 5.25 6 7 Ο

Mathematics For Machine Technology

8th Edition

ISBN:9781337798310

Author:Peterson, John.

Publisher:Peterson, John.

Chapter29: Tolerance, Clearance, And Interference

Section: Chapter Questions

Problem 15A

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Find the mean hourly cost when the cell phone described above is used for 240 minutes.
For item 1 to 3. Table 1.3 The following figures, released by the Federal Trade Commission, show the milligrams of tar and nicotine found in 10 brands of cigarettes. Brand Tar Content(X) Nicotine Content(Y) Viceroy 14 0.9 Marlboro 17 1.1 Chesterfield 28 1.6 Kool 17 1.3 Kent 16 1.0 Raleigh 0.8 Old Gold 1.5 Philip Morris 1.4 Oasis 18 1.2 Players 31 2.0 Calculate the rank correlation coefficient(in 2 decimal places) to measure the degree of relationship between tar and nicotine content in cigarettes. Sample answer. 0.57 13 24 25
I. The Department of Agriculture obtained the following data representing the one week growth in centimeters of 30 newly planted corn plants.
ans. only number 1
Refer to Table 1.6. a. What is the average cost for the tablets? b. Compare the average cost of tablets with a Windows operating system to the average cost of tablets with an Android operating system. c.What percentage of tablets use a CPU manufactured by Tl OMAP? d. What percentage of tablets use an Android operating system?
(b) Estimate the standard errors of the slope and intercept. Round your answer to three decimal places (e.g. 98.765) se B, Round your answer to two decimal places (e.g. 98.76) se(bo ) = I (c) Test the hypothesis Ho: B1 = 10 versus H1:ß1 + 10using a = 0.01. v Họ and conclude the slope 10 at a = 0.01. (d) Test the hypothesis Ho: Bo = 0 versus H1: Bo # 0 using a = 0.01. Họ and conclude that the intercept v be included in the model.
1. The number of pounds of steam used per month by a chemical plant is thought to be related to the average ambient temperature (in degF) for that month. The past year's usage and temperature are shown in the following table: Month Temp. Usage/1000 Month Temp. Usage/1000 Jan. 21 185.79 July 68 621.55 Feb. 24 214.47 Aug. 74 675.06 Mar. 32 288.03 Sept. 62 562.03 Apr. 47 424.84 Oct. 50 452.93 May 50 454.58 Nov. 41 369.95 June 59 539.03 Dec. 30 273.98 (a) Assuming that a simple linear regression model is appropriate, fit the regression model relating steam usage (y) to the average temperature (x). (b) What is the estimate of expected steam usage when the average temperature is 55F?
(e) Test the hypothesis Ho : B1 = 10 versus H1 :ß, # 10 using a = 0.01. Ho and conclude the slope v 10 at a = 0.01. (d) Test the hypothesis Ho : Bo = 0 versus H1 : Bo + 0 using a = 0.01. Ho and conclude that the intercept be included in the model.
3. The number of pounds of steam used per month by a chemical plant is thought to be related to the average ambient temperature (in °F) for that month. The past year's usage and temperatures are in the following table: Month Temp. Usage/1000 Jan. Feb. Mar. 21 Dec. 24 32 Apr. May June July Aug. 74 Sept. 62 Oct. Nov. 47 50 59 68 50 41 30 185.79 214.47 288.03 424.84 454.58 539.03 621.55 675.06 562.03 452.93 369.95 273.98 Assuming that a simple linear regression model is appropriate, fit the regression model relating steam usage (y) to the average temperature (x). (a) Find a 99% confidence interval for B₁. (b) Find a 99% confidence interval for B. (c) Find a 95% confidence interval on mean steam usage when the average temperature is 51°F. (d) Find a 95% prediction interval on steam usage when the temperature is 51°F.
The Department of Agriculture obtained the following data representing the one-week growth in centimeters of 30 newly planted corn plants.
3. The Office of Coal, Nuclear, Electric and Alternate Fuels reported the following data as the costs (in cents) of the average revenue per kilowatt- hour for sectors in Arkansas: 6.61 7.61 6.99 7.48 5.10 7.56 6.65 5.93 7.92 5.52 7.47 6.79 8.27 7.50 7.44 6.36 5.20 5.48 7.69 8.74 5.75 6.94 7.70 6.67 4.59 5.96 7.26 5.38 8.88 7.49 6.89 7.25 6.89 6.41 5.86 8.04 a. Prepare a grouped frequency distribution for the average revenue per kilowatt-hour using class boundaries 4, 5, 6, 7, 8, 9 b. Find the class width. c. List the class midpoints d. Construct a relative frequency histogram of these data.
The prices of agricultural commodities for 1946-47 and for the inonth of Dece:mber 1950 are given below along with the value of the output of hese commodities in 1946-47: Value of outptl in million (Rs.) Prices ELIII Commodities Unit 1946-47 (Rs.) Dec. 1950 (Rs.) (1946-47) 13.75 9-70 8364 Rice Wheat Jowar maund таund 13-75 9.70 2207 6:03 8.00 876 maund 466 00 433.00 701 Cotton (raw) Tea Ibs. 1:25 1:75 534 Ibs. Calculate the weighted index mumber of prices of these commodities for December 1950 taking 1946-47 as base.