Practical Business Math Procedures with Business Math Handbook
12th Edition
ISBN: 9781259725067
Author: Jeffrey Slater, Sharon M. Wittry
Publisher: McGraw-Hill Education
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Chapter 17.1, Problem 1EPQ
To determine
To prepare: A depreciation schedule by using the straight-line depreciation method for the given data.
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Answer questions 8.2.1 and 8.2.2 respectively
8.2.3 A research engineer for a tire manufacturer is investigating
tire life for a new rubber compound and has built 16 tires and
tested them to end-of-life in a road test. The sample mean and
standard deviation are 60,139.7 and 3645.94 kilometers. Find a
95% confidence interval on mean tire life.
8.2.4 Determine the t-percentile that is required to construct each of the following one-sided confidence intervals:
a. Confidence level = 95%, degrees of freedom = 14
b. Confidence level = 99%, degrees of freedom = 19
c. Confidence level = 99.9%, degrees of freedom = 24
8.1.6The yield of a chemical process is being studied. From previous experience, yield is known to be normally
distributed and σ = 3. The past 5 days of plant operation have
resulted in the following percent yields: 91.6, 88.75, 90.8, 89.95,
and 91.3. Find a 95% two-sided confidence interval on the true
mean yield.
8.1.7 .A manufacturer produces piston rings for an automobile engine. It is known that ring diameter is normally distributed
with σ = 0.001 millimeters. A random sample of 15 rings has a
mean diameter of x = 74.036 millimeters.
a. Construct a 99% two-sided confidence interval on the
mean piston ring diameter.
b. Construct a 99% lower-confidence bound on the mean
piston ring diameter. Compare the lower bound of this confi-
dence interval with the one in part (a).
Chapter 17 Solutions
Practical Business Math Procedures with Business Math Handbook
Ch. 17.1 - Prepare a depreciation schedule using...Ch. 17.1 - If the truck were bought on February 3, what would...Ch. 17.1 - Prepare a depreciation schedule using...Ch. 17.1 - If the truck were bought on February 3, what would...Ch. 17.1 - Prob. 1AHCh. 17.1 - Find the annual depreciation using the...Ch. 17.1 - Prob. 3AHCh. 17.1 - Find the first-year depreciation to the nearest...Ch. 17.1 - Prob. 5AHCh. 17.1 - Prob. 6AH
Ch. 17.1 - Prob. 7AHCh. 17.1 - Prob. 8AHCh. 17.1 - Prob. 9AHCh. 17.1 - Prob. 10AHCh. 17.1 - Prob. 11AHCh. 17.2 - From the following facts prepare a depreciation...Ch. 17.2 - From the following facts prepare a depreciation...Ch. 17.2 - Prob. 1AHCh. 17.2 - Prob. 2AHCh. 17.2 - Prob. 3AHCh. 17.2 - Prob. 4AHCh. 17.2 - Prob. 5AHCh. 17.2 - Forsmann & Smythe purchased a new machine that...Ch. 17.2 - Young Electrical Company depreciates its vans...Ch. 17.2 - Prob. 8AHCh. 17.3 - Prob. 1PQCh. 17.3 - Prob. 1EPQCh. 17.3 - Prob. 1AHCh. 17.3 - Prob. 2AHCh. 17.3 - Prob. 3AHCh. 17.3 - Prob. 4AHCh. 17.3 - Prob. 5AHCh. 17.3 - Prob. 6AHCh. 17.3 - Prob. 7AHCh. 17.3 - Prob. 8AHCh. 17.3 - Prob. 9AHCh. 17.4 - In 2015, Rancho Corporation bought semiconductor...Ch. 17.4 - Prob. 2PQCh. 17.4 - Prob. 1EPQCh. 17.4 - Prob. 2EPQCh. 17.4 - Prob. 1AHCh. 17.4 - Prob. 2AHCh. 17.4 - Prob. 3AHCh. 17.4 - Prob. 4AHCh. 17.4 - Prob. 5AHCh. 17.4 - Prob. 6AHCh. 17.4 - Wolfe Ltd. purchased a supercomputer for $75,000...Ch. 17.4 - Prob. 8AHCh. 17.4 - Prob. 9AHCh. 17 - Prob. 1ECPCh. 17 - From the following facts, complete a depreciation...Ch. 17 - Prob. 3ECPCh. 17 - Prob. 4ECPCh. 17 - Prob. 5ECPCh. 17 - Prob. 6ECPCh. 17 - From the following facts, complete a depreciation...Ch. 17 - Prob. 8ECPCh. 17 - Prob. 9ECPCh. 17 - Prob. 10ECPCh. 17 - From the following facts, prepare a depreciation...Ch. 17 - Prob. 12ECPCh. 17 - For the first 2 years, calculate the depreciation...Ch. 17 - For the first 2 years, calculate the depreciation...Ch. 17 - Complete the following table given this...Ch. 17 - Prob. 16ECPCh. 17 - Prob. 17ECPCh. 17 - Prob. 18ECPCh. 17 - Prob. 19ECPCh. 17 - Prob. 20ECPCh. 17 - Prob. 21ECPCh. 17 - Prob. 22ECPCh. 17 - Prob. 23ECPCh. 17 - Whole Foods, the world’s leader in natural and...Ch. 17 - Prob. 25ECPCh. 17 - If corporate headquarters for UPS in Atlanta is...Ch. 17 - Prob. 27ECPCh. 17 - Prob. 28ECPCh. 17 - Prob. 1PTCh. 17 - Prob. 2PTCh. 17 - Prob. 3PTCh. 17 - Prob. 4PTCh. 17 - Prob. 5PT
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- 8.1.2 .Consider the one-sided confidence interval expressions for a mean of a normal population. a. What value of zα would result in a 90% CI? b. What value of zα would result in a 95% CI? c. What value of zα would result in a 99% CI? 8.1.3 A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05) a. What is the value of the sample mean? b. One of these intervals is a 95% CI and the other is a 90% CI. Which one is the 95% CI and why?arrow_forward8.1.4 . A confidence interval estimate is desired for the gain in a circuit on a semiconductor device. Assume that gain is normally distributed with standard deviation σ = 20. a. How large must n be if the length of the 95% CI is to be 40? b. How large must n be if the length of the 99% CI is to be 40? 8.1.5 Suppose that n = 100 random samples of water from a freshwater lake were taken and the calcium concentration (milligrams per liter) measured. A 95% CI on the mean calcium concentration is 0.49 g μ g 0.82. a. Would a 99% CI calculated from the same sample data be longer or shorter? b. Consider the following statement: There is a 95% chance that μ is between 0.49 and 0.82. Is this statement correct? Explain your answer. c. Consider the following statement: If n = 100 random samples of water from the lake were taken and the 95% CI on μ computed, and this process were repeated 1000 times, 950 of the CIs would contain the true value of μ. Is this statement correct? Explain your answerarrow_forward2 6. Modelling. Suppose that we have two tanks (A and B) between which a mixture of brine flows. Tank A contains 200 liters of water in which 50 kilograms of salt has been dissolved and Tank B contains 100 liters of pure water. Water containing 1kg of salt per liter is pumped into Tank A at the rate of 5 liters per minute. Brine mixture is pumped into Tank A from Tank B at the rate of 3 liters per minute and brine mixture is pumped from Tank A into Tank B at the rate of 8 liters per minute. Brine is drained from Tank B at a rate of 5 liters per minute. (a) Draw and carefully label a picture of the situation, including both tanks and the flow of brine between them. JankA 1ks of Salt Slits Pump EL Brine mit tark A from tank 13 Tank 13 k 3L zooliters of Ico liters of water with pure water. Saky salt → 777 disslore inside Brine mix is pumped from tank A to B of 82 Brine drainen min by Gf salt (b) Assume all brine mixtures are well-stirred. If we let t be the time in minutes, let x(t) 1ks…arrow_forward
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