Mathematics for the Trades: A Guided Approach (11th Edition) (What's New in Trade Math)
11th Edition
ISBN: 9780134756967
Author: Hal Saunders, Robert Carman
Publisher: PEARSON
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Chapter 8.2, Problem 6AE
Find the perimeter of each
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Answer question S8 stepwise
Answer questions 8.2.11 and 8.2.12 respectively
8.4.2 An article in Knee Surgery, Sports Traumatology, Arthroscopy [“Arthroscopic Meniscal Repair with an
Absorbable Screw: Results and Surgical Technique” (2005, Vol.
13, pp. 273–279)] showed that only 25 out of 37 tears (67.6%)
located between 3 and 6 mm from the meniscus rim were healed.
a. Calculate a two-sided 95% confidence interval on the proportion of such tears that will heal.
b. Calculate a 95% lower confidence bound on the proportion of such tears that will heal.
8.4.3 An article in the Journal of the American Statistical Association [“Illustration of Bayesian Inference in Normal Data Models Using Gibbs Sampling” (1990, Vol. 85, pp.
972–985)] measured the weight of 30 rats under experiment controls. Suppose that 12 were underweight rats.
a. Calculate a 95% two-sided confidence interval on the true
proportion of rats that would show underweight from the
experiment.
b. Using the point estimate of p obtained from the preliminary sample, what sample size is needed to be 95%…
Chapter 8 Solutions
Mathematics for the Trades: A Guided Approach (11th Edition) (What's New in Trade Math)
Ch. 8.1 - What fraction of a circle is this?Ch. 8.1 - Which of these angles measures closest to 45...Ch. 8.1 - A. Solve the following. If you need a protractor,...Ch. 8.1 - Use the geometry relationships to answer the...Ch. 8.1 - Use the geometry relationships to answer the...Ch. 8.1 - In each figure, two parallel lines are cut by a...Ch. 8.1 - Machine Trades A machinist receives a sketch of a...Ch. 8.1 - Carpentry A carpenter wishes to make a...Ch. 8.1 - Carpentry A carpenters square is placed over a...Ch. 8.1 - Carpentry Board 1 must be joined to board 2 at a...
Ch. 8.1 - Welding In the pipe flange shown, the six bolt...Ch. 8.2 - Which of these are rectangles? (a) (1) only (b)...Ch. 8.2 - In question 1, what is the perimeter of figure...Ch. 8.2 - Find the perimeter of each polygon.Ch. 8.2 - Find the perimeter of each polygon.Ch. 8.2 - Find the perimeter of each polygon.Ch. 8.2 - Find the perimeter of each polygon.Ch. 8.2 - Find the perimeter of each polygon.Ch. 8.2 - Find the perimeter of each polygon.Ch. 8.2 - Find the perimeter of each polygon.Ch. 8.2 - Find the perimeter of each polygon.Ch. 8.2 - Find the perimeter of each polygon.Ch. 8.2 - Find the perimeter of each polygon.Ch. 8.2 - Find the perimeter of each polygon.Ch. 8.2 - Find the perimeter of each polygon.Ch. 8.2 - Find the perimeter and area of each figure. (Round...Ch. 8.2 - Find the perimeter and area of each figure. (Round...Ch. 8.2 - Find the perimeter and area of each figure. (Round...Ch. 8.2 - Find the perimeter and area of each figure. (Round...Ch. 8.2 - Find the perimeter and area of each figure. (Round...Ch. 8.2 - Find the perimeter and area of each figure. (Round...Ch. 8.2 - Find the perimeter and area of each figure. (Round...Ch. 8.2 - Find the perimeter and area of each figure. (Round...Ch. 8.2 - Find the perimeter and area of each figure. (Round...Ch. 8.2 - Find the perimeter and area of each figure. (Round...Ch. 8.2 - Find the perimeter and area of each figure. (Round...Ch. 8.2 - Find the perimeter and area of each figure. (Round...Ch. 8.2 - Masonry How many bricks will it take to build the...Ch. 8.2 - Carpentry How many square feet of wood are needed...Ch. 8.2 - Flooring and Carpeting The floor plan of a room is...Ch. 8.2 - Construction The amount of horizontal wood siding...Ch. 8.2 - Flooring and Carpeting How many bundles of strip...Ch. 8.2 - Construction A large rectangular window opening...Ch. 8.2 - Masonry Find the area of one stretcher course of...Ch. 8.2 - Masonry To determine the approximate number of...Ch. 8.2 - Automotive Trades A roll of gasket material is...Ch. 8.2 - Prob. 10CECh. 8.2 - Prob. 11CECh. 8.2 - Printing A ream of 17-in. by 22-in. paper weighs...Ch. 8.2 - Prob. 13CECh. 8.2 - HVAC To determine the size of a heating system...Ch. 8.2 - Construction A playground basketball court 94 ft...Ch. 8.2 - Landscaping At 6.75 per square foot, plus a 60...Ch. 8.2 - Agriculture Fertilizer must be applied to the...Ch. 8.2 - Agriculture In problem 17, the plot of land must...Ch. 8.2 - Prob. 19CECh. 8.2 - Prob. 20CECh. 8.2 - Prob. 21CECh. 8.2 - Flooring and Carpeting When expressed in U.S....Ch. 8.2 - Prob. 23CECh. 8.2 - Prob. 24CECh. 8.2 - Prob. 25CECh. 8.2 - Prob. 26CECh. 8.2 - Prob. 27CECh. 8.2 - Prob. 28CECh. 8.2 - Prob. 29CECh. 8.2 - Prob. 30CECh. 8.3 - How many sides does a hexagon have?Ch. 8.3 - Which of these appears to be a right triangle?Ch. 8.3 - Find the missing dimensions of each figure shown....Ch. 8.3 - Find the missing dimensions of each figure shown....Ch. 8.3 - Find the missing dimensions of each figure shown....Ch. 8.3 - Find the missing dimensions of each figure shown....Ch. 8.3 - Prob. 5AECh. 8.3 - Find the missing dimensions of each figure shown....Ch. 8.3 - Prob. 7AECh. 8.3 - Find the missing dimensions of each figure shown....Ch. 8.3 - Prob. 9AECh. 8.3 - Find the missing dimensions of each figure shown....Ch. 8.3 - Prob. 11AECh. 8.3 - Find the missing dimensions of each figure shown....Ch. 8.3 - Prob. 13AECh. 8.3 - Find the missing dimensions of each figure shown....Ch. 8.3 - Find the missing dimensions of each figure shown....Ch. 8.3 - Prob. 16AECh. 8.3 - Prob. 17AECh. 8.3 - Prob. 18AECh. 8.3 - Prob. 19AECh. 8.3 - Find the missing dimensions of each figure shown....Ch. 8.3 - Find the missing dimensions of each figure shown....Ch. 8.3 - Find the missing dimensions of each figure shown....Ch. 8.3 - Prob. 1BECh. 8.3 - Find the area of each figure. All hexagons are...Ch. 8.3 - Prob. 3BECh. 8.3 - Prob. 4BECh. 8.3 - Prob. 5BECh. 8.3 - Prob. 6BECh. 8.3 - Find the area of each figure. All hexagons are...Ch. 8.3 - Find the area of each figure. All hexagons are...Ch. 8.3 - Prob. 9BECh. 8.3 - Prob. 10BECh. 8.3 - Prob. 11BECh. 8.3 - Find the area of each figure. All hexagons are...Ch. 8.3 - Find the area of each figure. All hexagons are...Ch. 8.3 - Find the area of each figure. All hexagons are...Ch. 8.3 - Find the area of each figure. All hexagons are...Ch. 8.3 - Find the area of each figure. All hexagons are...Ch. 8.3 - Find the area of each figure. All hexagons are...Ch. 8.3 - Prob. 18BECh. 8.3 - Prob. 19BECh. 8.3 - Find the area of each figure. All hexagons are...Ch. 8.3 - Find the area of each figure. All hexagons are...Ch. 8.3 - Find the area of each figure. All hexagons are...Ch. 8.3 - Prob. 23BECh. 8.3 - Find the area of each figure. All hexagons are...Ch. 8.3 - C. Practical Applications 1. Painting At 460 sq ft...Ch. 8.3 - Sheet Metal Trades A four-sided vent connection...Ch. 8.3 - Roofing The aerial view of a roof is shown in the...Ch. 8.3 - Roofing In problem 3, how many feet of gutters are...Ch. 8.3 - Carpentry Allowing for a 3-ft overhang, how long a...Ch. 8.3 - Metalworking A cut is to be made in a piece of...Ch. 8.3 - Prob. 7CECh. 8.3 - Construction Find the area of the gable end of the...Ch. 8.3 - Construction Find the missing dimensions x and y...Ch. 8.3 - Welding The steel gusset shown is made in the...Ch. 8.3 - Prob. 11CECh. 8.3 - C. Practical Applications 12. Construction A...Ch. 8.3 - Prob. 13CECh. 8.3 - C. Practical Applications 14. Agriculture A plot...Ch. 8.3 - Prob. 15CECh. 8.3 - Prob. 16CECh. 8.3 - Prob. 17CECh. 8.3 - Prob. 18CECh. 8.4 - What is the diameter of this circle?Ch. 8.4 - Prob. 2LCCh. 8.4 - Prob. 1AECh. 8.4 - Find the missing quantities for each circle. Use...Ch. 8.4 - Find the missing quantities for each circle. Use...Ch. 8.4 - Find the missing quantities for each circle. Use...Ch. 8.4 - Find the missing quantities for each circle. Use...Ch. 8.4 - Find the missing quantities for each circle. Use...Ch. 8.4 - Prob. 1BECh. 8.4 - Find the circumference and area of each circle....Ch. 8.4 - Find the circumference and area of each circle....Ch. 8.4 - Find the circumference and area of each circle....Ch. 8.4 - Prob. 5BECh. 8.4 - Prob. 6BECh. 8.4 - Prob. 7BECh. 8.4 - Find the circumference and area of each circle....Ch. 8.4 - Prob. 9BECh. 8.4 - Prob. 10BECh. 8.4 - Prob. 1CECh. 8.4 - Prob. 2CECh. 8.4 - Prob. 3CECh. 8.4 - Prob. 4CECh. 8.4 - Prob. 5CECh. 8.4 - Prob. 6CECh. 8.4 - Prob. 7CECh. 8.4 - Prob. 8CECh. 8.4 - Prob. 9CECh. 8.4 - Prob. 10CECh. 8.4 - Prob. 11CECh. 8.4 - Prob. 12CECh. 8.4 - Find the length of stock needed to create each...Ch. 8.4 - Prob. 14CECh. 8.4 - Find the length of stock needed to create each...Ch. 8.4 - Metalworking What length of 1-in. stock is needed...Ch. 8.4 - Landscaping (a) Calculate, to the nearest square...Ch. 8.4 - Machine Trades What diameter must a circular piece...Ch. 8.4 - Machine Trades In problem 3, how many square...Ch. 8.4 - Plumbing What is the cross-sectional area of a...Ch. 8.4 - Machine Trades In the piece of steel shown in the...Ch. 8.4 - Plumbing How much additional cross-sectional area...Ch. 8.4 - Machine Trades What diameter round stock is needed...Ch. 8.4 - Landscaping How many plants spaced every 6 in. are...Ch. 8.4 - Machine Trades What diameter circular stock is...Ch. 8.4 - Carpentry At 11.25 per foot for the curved portion...Ch. 8.4 - Sports and Leisure If the radius of the...Ch. 8.4 - Manufacturing What is the total length of belting...Ch. 8.4 - Electrical Trades An electrician bends a 12-in....Ch. 8.4 - Metalworking How many inches apart will eight...Ch. 8.4 - Landscaping How many square yards of concrete...Ch. 8.4 - Carpentry The circular saw shown in the figure has...Ch. 8.4 - Automotive Trades A hose must fit over a...Ch. 8.4 - Automotive Trades What length on the circumference...Ch. 8.4 - Prob. 20DECh. 8.4 - Water/Wastewater Treatment To find the velocity of...Ch. 8.4 - Plumbing The pressure exerted by a column of water...Ch. 8.4 - Plumbing To construct a bracket for a drain pipe,...Ch. 8.4 - Culinary Arts A small pizza at Papas Pizza Place...Ch. 8.4 - D. Practical Applications Sports and Leisure Two...Ch. 8.4 - D. Practical Applications Forestry Forest service...Ch. 8.4 - Prob. 27DECh. 8.4 - Prob. 28DECh. 8.4 - Prob. 29DECh. 8.4 - Sheet Metal Trades What is the area of the largest...Ch. 8 - Classify angles. (a) (a) DEF is _____ (b) (b) GHI...Ch. 8 - Prob. 3PCh. 8 - Identify polygons, including triangles, squares,...Ch. 8 - Use the Pythagorean theorem.Ch. 8 - Prob. 6PCh. 8 - Solve practical problems involving area and...Ch. 8 - Solve the following problems involving angles....Ch. 8 - Solve the following problems involving angles....Ch. 8 - Solve the following problems involving angles....Ch. 8 - Solve the following problems involving angles....Ch. 8 - Solve the following problems involving angles....Ch. 8 - Solve the following problems involving angles....Ch. 8 - A. Solve the following problems involving angles....Ch. 8 - Prob. 1BPSCh. 8 - Prob. 2BPSCh. 8 - Prob. 3BPSCh. 8 - Prob. 4BPSCh. 8 - Prob. 5BPSCh. 8 - Prob. 6BPSCh. 8 - Prob. 7BPSCh. 8 - Prob. 8BPSCh. 8 - Prob. 9BPSCh. 8 - Prob. 10BPSCh. 8 - Prob. 11BPSCh. 8 - Prob. 12BPSCh. 8 - Prob. 13BPSCh. 8 - Prob. 14BPSCh. 8 - Prob. 15BPSCh. 8 - Prob. 16BPSCh. 8 - Prob. 17BPSCh. 8 - Prob. 18BPSCh. 8 - Prob. 19BPSCh. 8 - Prob. 20BPSCh. 8 - Prob. 21BPSCh. 8 - Find the missing dimensions of the following...Ch. 8 - Find the missing dimensions of the following...Ch. 8 - Find the missing dimensions of the following...Ch. 8 - Find the missing dimensions of the following...Ch. 8 - Find the missing dimensions of the following...Ch. 8 - Prob. 6CPSCh. 8 - Find the radius of a circle with a circumference...Ch. 8 - Find the diameter of a circle with a circumference...Ch. 8 - Prob. 9CPSCh. 8 - Construction What will it cost to pave a...Ch. 8 - Metalworking A steel brace is used to strengthen...Ch. 8 - D. Practical Applications Machine Trades Holes are...Ch. 8 - Masonry How many square feet of brick are needed...Ch. 8 - Electrical Trades A coil of wire has an average...Ch. 8 - Prob. 7DPSCh. 8 - Metalworking Find the length of straight stock...Ch. 8 - Machine Trades A hexagonal piece of steel 9 in. on...Ch. 8 - Construction How much guy wire is needed to anchor...Ch. 8 - Carpentry How many 4-ft by 8-ft sheets of exterior...Ch. 8 - Prob. 12DPSCh. 8 - Metalworking A triangular shape with a base of 6...Ch. 8 - Construction An air shaft is drilled from the...Ch. 8 - Machine Trades What diameter circular stock is...Ch. 8 - Life Skills A 17-ft roll of weather stripping...Ch. 8 - Prob. 18DPSCh. 8 - Manufacturing What length of belt is needed for...Ch. 8 - Electrical Trades Electrical conduit must conform...Ch. 8 - Construction At 11 per square foot, how much will...Ch. 8 - Prob. 22DPSCh. 8 - Welding The top to a container is made of steel...Ch. 8 - Prob. 24DPSCh. 8 - Prob. 25DPSCh. 8 - Prob. 26DPSCh. 8 - Prob. 27DPSCh. 8 - Prob. 28DPSCh. 8 - Agriculture The plot of farmland shown in the...Ch. 8 - Prob. 30DPSCh. 8 - Masonry The figure shows a rectangular swimming...Ch. 8 - Landscaping The figure shows a flower garden in...Ch. 8 - Prob. 33DPSCh. 8 - Prob. 34DPSCh. 8 - Prob. 35DPSCh. 8 - Prob. 36DPSCh. 8 - Prob. 37DPSCh. 8 - Construction A rectangular room measures 14 ft by...
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- 8.4.8 Use the data from Exercise 8.4.2 to compute the two-sided Agresti-Coull CI on the proportion of tears that heal. Compare and discuss the relationship of this interval to the one computed in Exercise 8.4.2.arrow_forwardAnswer questions 8.3.7 and 8.4.1 respectivelyarrow_forwardDon't do 14. Please solve 19arrow_forward
- 8.4.7 Use the data from Exercise 8.4.5 to compute the two-sided Agresti-Coull CI on the proportion of digits read correctly. Compare and discuss the relationship of this interval to the one computed in Exercise 8.4.5.arrow_forward8.6.5 Consider the fuel rod enrichment data described in Exercise 8.2.11. Compute a 90% prediction interval on the enrichment of the next rod tested. Compare the length of the prediction interval with the length of the 99% CI on the population mean.arrow_forward8.4.4 The Arizona Department of Transportation wishes to survey state residents to determine what proportion of the population would like to increase statewide highway speed limits from 65 mph to 75 mph. How many residents does the department need to survey if it wants to be at least 99% confident that the sample proportion is within 0.05 of the true proportion? 8.4.5 The U.S. Postal Service (USPS) has used optical character recognition (OCR) since the mid-1960s. In 1983, USPS began deploying the technology to major post offices throughout the country (www.britannica.com). Suppose that in a random sample of 500 handwritten zip code digits, 466 were read correctly. a. Construct a 95% confidence interval for the true proportion of correct digits that can be automatically read. b. What sample size is needed to reduce the margin of error to 1%? c. How would the answer to part (b) change if you had to assume that the machine read only one-half of the digits correctly?arrow_forward
- 8.6.4 Consider the test on the compressive strength of concrete described in Exercise 8.2.9. Compute a 90% prediction interval on the next specimen of concrete tested. 8.6.5 . SS Consider the fuel rod enrichment data described in Exercise 8.2.11. Compute a 90% prediction interval on the enrichment of the next rod tested. Compare the length of the prediction interval with the length of the 99% CI on the population mean.arrow_forwardAnswer questions 8S10 and 8S11 respectively.arrow_forward8.4.6 Information on a packet of seeds claims that 93% of them will germinate. Of the 200 seeds that were planted, only 180 germinated. a. Find a 95% confidence interval for the true proportion of seeds that germinate based on this sample. b. Does this seem to provide evidence that the claim is wrong? 8.6.1 Consider the tire-testing data described in Exercise 8.2.3. Compute a 95% prediction interval on the life of the next tire of this type tested under conditions that are similar to those employed in the original test. Compare the length of the prediction interval with the length of the 95% CI on the population mean.arrow_forward
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