## Question

###### Question 4: To access the accuracy of a laboratory scale, a standard weight known to weigh...

Question 4: To access the accuracy of a laboratory scale, a standard weight known to weigh 10g is weighed repeatedly. The scale readings are normally distributed with standard t. The weight is measured five times. The mean result is 0.0023g. Give a 91.64% b. How rnany measurements needed to get the bound on the error of estimation with 98% deviation 0.0002g confidence interval for the mean of the true weight. confidence is less than 0.0001?

## Answers

SolutionA:

sample mean=10.0023g

n=5

alpha=1-0.9164=0.0836

given std deviation=0.0002 g

91.64 % confidence interval for mean is given by

xbar-margin of error and xbar+margin of error

margin of error in excel is

=CONFIDENCE.NORM(0.0836;0.0002;5)

=0.000155

91.64 % confidence interval for mean of true weight is given by

10.0023-0.000155 and 10.0023+0.000155

10.00215 and 10.00245

lower limit= 10.00215

upper limit=10.00245Solutionb:

E=0.0001

z crit for 98%=2.326

n=(Z alpha/2*sigma/E)^2

=(2.326*0.0002/0.0001)^2

n=21.64

n=22

Required sample szie=n=22

#### Similar Solved Questions

1 answers

##### How do you write the partial fraction decomposition of the rational expression # (x^3 - 6x^2 + 11x - 6) / (4x^3 - 28x^2 + 56x - 32) #?

How do you write the partial fraction decomposition of the rational expression # (x^3 - 6x^2 + 11x - 6) / (4x^3 - 28x^2 + 56x - 32) #?...

1 answers

##### Exercise 13-9 Risk and capital structure analysis LO P3 (The following information applies to the questions...

Exercise 13-9 Risk and capital structure analysis LO P3 (The following information applies to the questions displayed below.] Simon Company's year-end balance sheets follow 2017 2016 2015 At December 31 Assets Cash Accounts receivable, net Merchandise inventory Prepaid expenses Plant assets, net...

1 answers

##### Questions 1 & 2 ask for cash flows only, no present values. They are a critical...

Questions 1 & 2 ask for cash flows only, no present values. They are a critical part of the problem, but since the problem is primarily about capital budgeting, they are not worth any points, and you have unlimited tries. Questions 3 & 4 require that you use the correct cash flows from 1 and...

1 answers

##### 7. Work It Out. Consider an economy with two sectors: manufacturing and services. Demand for labor...

7. Work It Out. Consider an economy with two sectors: manufacturing and services. Demand for labor in manufacturing and services are described by these equations: L Lm=200-6WmLs=100-4W L = 200 - 6W = 100 - 4W. where Lis labor (in number of workers), W is the wage (in dollars), and the subscripts den...

1 answers

##### Consider the case of Red Rabbit Builders: Red Rabbit Builders is expected to generate a free...

Consider the case of Red Rabbit Builders: Red Rabbit Builders is expected to generate a free cash flow (FCF) of $1,225,000 this year, and the FCF is expected to grow at a rate of 18% over the following two years (FCF2 and FCF3). After the third year, however, the company's FCFs are expected to g...

1 answers

##### In a certain candy store, 3 pounds of candy and 2 pounds of mints cost $10.80, and 1 pound of candy and 3 pounds of mints cost $5.35. What is the cost per pound of the candy and the mints?

In a certain candy store, 3 pounds of candy and 2 pounds of mints cost $10.80, and 1 pound of candy and 3 pounds of mints cost $5.35. What is the cost per pound of the candy and the mints?...

1 answers

##### You discover a new virus and determine that it is a negative strand RNA virus. A....

You discover a new virus and determine that it is a negative strand RNA virus. A. Does it require any nucleic acid intermediates before its genes can be transcribed inside the host cell? If so, what? Explain your answer: B. Does it require any nucleic acid intermediates before its genes can be trans...

1 answers

##### He following information is available for a potential investment for Panda Company: Initial investment $110000 Net...

he following information is available for a potential investment for Panda Company: Initial investment $110000 Net annual cash inflow 20000 Net present value 44650 Salvage value 10000 Useful life 10 yrs. The potential investment’s profitability index is 5.50. 3.55. 2.46. 1.41....

1 answers

##### A reaction has the mechanism A + B X + B rightarrow P with rate constants...

A reaction has the mechanism A + B X + B rightarrow P with rate constants k_1, k_-1, and kr. Assuming a steady state approximation for [X] is valid, write the rate law for d[P]/dt?...

1 answers

##### Problem4: 25 Ω b 1 = 0, T 80 Ω a 100 Ω + + +...

Problem4: 25 Ω b 1 = 0, T 80 Ω a 100 Ω + + + 100 V 240 Ω υο 80 μF 275 V Υ 16 mH (b) Find Il(s). Find i(t). (c) Find the zero-input and the zero-state components of iz(t) for t > 0....

2 answers

##### Provide the missing compounds for each step in the following synthesis. Please use Br as your...

Provide the missing compounds for each step in the following synthesis. Please use Br as your leaving group, should you require one. Be sure to show stereochemistry explicitly where necessary, using wedges and dashes. Please draw all four bonds at the sp2 carbons and at chiral carbons, including th...

1 answers

##### Draw a sketch (free hand or otherwise) to show frequency modulation of the bit pattern [0...

Draw a sketch (free hand or otherwise) to show frequency modulation of the bit pattern [0 1 1 0 1 1 1 0]....

1 answers

##### Consider the mechanism of the reaction shown below. Give the structure of the next important organic...

Consider the mechanism of the reaction shown below. Give the structure of the next important organic reaction intermediate along the reaction coordinate. Your answer could be the final product. OH H2S04 heat...

1 answers

##### 1. Find the Activity Rate. 2. Find the Assigning Overhead Cost. The following data are for...

1. Find the Activity Rate. 2. Find the Assigning Overhead Cost. The following data are for the two products produced by Tadros Company. Product A Product B Direct materials $15 per unit $24 per unit Direct labor hours 0.3 DLH per unit 1.6 DLH per unit Machine hours 0.1 MH per unit 1.2 MH per unit Ba...

1 answers

##### A) Vs Rs Av and Us Rs Vo RA Vs & Vo pA 64 Noc Vo...

a) Vs Rs Av and Us Rs Vo RA Vs & Vo pA 64 Noc Vo Cout t a ?w...

1 answers

##### 1. Let f 1 , f 2 , … , f n be differentiable functions. Prove, using induction, that ( f 1 + f 2 ...

1. Let f 1 , f 2 , … , f n be differentiable functions. Prove, using induction, that ( f 1 + f 2 + ⋯ + f n ) ′ = f ′ 1 + f ′ 2 + ⋯ + f ′ n You may assume ( f + g ) ′ = f ′ + g ′ for any differentiable functions f and g . 2 .Make up a seque...

1 answers

##### 1. 3-methyl-1-butene on reaction with H-Cl forms two products, namely 2-chloro-3- methylbutane (minor) and 2-chloro-2-methylbutane (major)....

1. 3-methyl-1-butene on reaction with H-Cl forms two products, namely 2-chloro-3- methylbutane (minor) and 2-chloro-2-methylbutane (major). Illustrate the mechanism for the formation of these two products. Use curved arrows to illustrate electron movement and all intermediates must be shown. 2. 3,3-...

1 answers

##### The President of school wants to know how well Math 1401 students are doing at school....

The President of school wants to know how well Math 1401 students are doing at school. He wants a range for the GPAs. Construct a 95% confidence interval for the population mean GPA. Data set (GPA). Adjusted GPA 4 3.5 2.8 2.86 2.31 0 0 2.97 3.21 2.54 3.67 2.17 0 2.91 ...

1 answers

##### TIF 24-3 Communication The following conversation took place between Juanita Jackson, Vice President of Marketing, and...

TIF 24-3 Communication The following conversation took place between Juanita Jackson, Vice President of Marketing, and Les Miles, Controller of Diamond Computer Company: Juanita: I am really excited about our new computer coming out. I think it will be a real market success. Les: I'm really glad...