Question ( 4 ) The life in hours of a biomedical device under development in the...

Question ( 4 )

The life in hours of a biomedical device under development in the laboratory is known to be approximately normally distributed. A random sample of 15 devices is selected and found to have an average life of 5625.1 hours and a sample standard deviation of 226.1 hours.

Test the hypothesis that the true mean life of a biomedical device is greater than 5500
Verify your inference using the P-value approach.
Construct a 95% lower confidence bound on the mean and use it to test the hypothesis.
Suppose that if the mean life is as long as 5400 hours, the engineer would like to detect this difference with probability at least 0.90. Was the sample size n = 15 used in part (a) adequate? Use the sample standard deviation s as an estimate of σ in reaching your decision. Estimate what sample size is needed to detect this difference.

Expert Solution

orchestra answered 2 years ago

Problem 4: you work at a local pharmacy which manufactures and distributes a biomedical device intended...

Problem 4: you work at a local pharmacy which manufactures and distributes a biomedical device intended to provide a steady state concentration of 16 µg/ml with a infusion rate of 1 mg/hr. As a biomedical engineer, you need to fine-tune your device for a patient with only 1 normal kidney. Calculate the desirable infusion rate for this patient? Assuming a therapeutic window a 10-20 µg/mL, comment on the condition of the patient if he receives the normal device. Solution: Infusion...

Escitalopram with half life 27 - 32 hours question 1 half life 27-32 hours Calculate how...

Escitalopram with half life 27 - 32 hours question 1 half life 27-32 hours Calculate how long it takes to eliminate 95% of a single dose of escitalopram from the body. Provide the range of values and the equation used. From the given pharmacokinetics parameter, explain which elimination model of escitalopram is likely to follow. questionB what is the mechanism of actions of escitalopram, and the affect escitalopram has on the structure of the target site Identify the molecular target...

1. As a biomedical engineer, your duty in a private medical device manufacturing company is to...

1. As a biomedical engineer, your duty in a private medical device manufacturing company is to develop, manufacture, and CE certified osteoinductive bone tissue engineering scaffold. Select one proper scaffold and scaffold manufacturing method that would allow manufacturing osteoinductive scaffold, and briefly explain. Define and explain two different adequate vasculogenesis strategies that you can apply to your scaffold. This scaffold will be implantable and permeable (long term). Define and explain the biocompatibility process for CE certification. What would be the...

Consider the filtering stage of a biomedical device that passes physiological signals with frequencies ranging between...

Consider the filtering stage of a biomedical device that passes physiological signals with frequencies ranging between 159Hz and 1.59kHz and that delivers a total gain of four. Design the electronic circuit of the filtering stage using Sallen-Key Filter topology and using 10kΩ resistors only. Find the value of the capacitors in the circuit designed.

The following summary statistics represent the hours of battery life for 4 brands of laptops. At...

The following summary statistics represent the hours of battery life for 4 brands of laptops. At the 0.05 significance level, do the data provide sufficient evidence to conclude that a difference exists between the the battery life of the fourdifferent brands? Column n Mean Std. Dev. Brand_A 8 7.69 1.62 Brand_B 8 10.44 2.45 Brand_C 10 8.55 2.52 Brand_D 8 5.91 1.30

1. Assume the following for a project under evaluation: ** The project's life is 4 years....

1. Assume the following for a project under evaluation: ** The project's life is 4 years. ** The total time zero, initial cost of $55,000. ** The total net operating cash flow each year is $15,000. ** In addition to the terminal year operating cash flow, there is a non-operating, terminal year cash flow of $8,000. What is the project's IRR? Accept or reject the project? Again, assume the cost of capital for a project of this risk is 7%....

Question Number 1: Discussion on the development trend of logistics and supply chain under the background...

Question Number 1: Discussion on the development trend of logistics and supply chain under the background of increasingly internationalized industries in various countries Please describe it big.

Identify the stages of the System Development Life Cycle (SDLC) and four (4) activities. (20 marks)...

Identify the stages of the System Development Life Cycle (SDLC) and four (4) activities. Hints : student must describe each stage and link the stage with activities. remark : This is 20 marks question, please answer me in full sentence.

Question 5 Two new drugs are under development (drug A, drug B) with different mechanisms of...

Question 5 Two new drugs are under development (drug A, drug B) with different mechanisms of action for treating high cholesterol. These two groups were used in a clinical trial along with a placebo control group.There were 21 patients with high cholesterol available, and 7 were randomized to each treatment group.The reductions in cholesterol level from baseline (as a percentage of baseline) are shown in the table below. We want to know if either of the two drug groups is...

Cutting Speed (meters per minute) Useful Life Brand A (Hours) Useful Life Brand B (Hours) 30...

Cutting Speed (meters per minute) Useful Life Brand A (Hours) Useful Life Brand B (Hours) 30 5.2 6.3 30 4.4 6.4 30 5.2 5.2 40 4.5 6.0 40 3.7 4.6 40 2.5 5.0 50 4.4 4.5 50 2.8 4.0 50 1.0 3.7 60 4.0 3.8 60 2.0 3.0 60 1.1 2.4 70 1.1 1.5 70 0.5 2.0 70 3.0 1.0 . Use a 95% confidence interval to estimate the mean useful life of a brand A cutting tool when the...

Question