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WorksheetsIMPCB - Math and Statistics II
Total questions: 21
Worksheet time: 21mins
What operation is performed to double a binary number?
Inverting each bit
Inverting the left most bit
Reversing the order of the bits
Shifting each bit to the left and adding a 0 on the right
What is 01110101 in decimal?
184
117
317
96
What is the size of an 8 cm object on a image with a 50 cm field of view on a 512 X 512 matrix?
18 pixels
121 pixels
50 pixels
82 pixels
What type of memory can be read but not edited?
HD
RAM
SDA
ROM
A PET/CT scan acquires a 250 slice CT using a 512 X 512 pixel image grid at 16 bit pixel resolution and a 120 slice PET image using a 128 x 128 pixel image grid at 16 bit resolution. What is the total storage requirement for the PET/CT scan?
311MB
255MB
135MB
1080MB
What system is information storage on computers based on?
a decimal system
a binary system
a octal system
RAM
What type of data is lost when you turn a computer off?
Magnetic Tape
ROM
RAM
Hard Drive
Which computer component is responsible for executing a series of stored instructions?
Hard disk
RAM
CPU
SSD
How much storage is required for store an ASCII character?
8 bits
1 bit
16 MB
1 MB
What is the distance between points (0, 1, 2) and (3, 4, 5) on a 3-dimensional coordinate system?
6.1 cm
3.0 cm
4.7 cm
5.2 cm
What is the quadratic formula?
ax2 + bx + c = 0
x = [-b +/- sqrt(c2 - 4ad)]/(2a)
x = [-b +/- 4ad)]/(2a)
x = [-b +/- sqrt(b2 - 4ac)]/(2a)
x = [-b +/- sqrt(b2 - 4ac)]/(2b)
How many days does it take to deliver 90% of the dose of Pd-103 (half life = 17 days) seed?
47.1 days
39.5 days
56.5 days
71.5 days
You are taking a professional exam and have no idea how to answer the final 10 questions. Each question has 4 possible choices. Based purely on chance, what is the probability of correctly guessing 8 of the questions?
0.0015%
0.71%
3.8%
0.04%
A gamma camera detects an average of 100 counts per study. What is the standard deviation 4 assuming a Poisson distribution of measurements?
10%
1%
2.718%
33.3%
A radioactive sample is repeatedly counted yielding an average of 500 counts over one minute. 95% of 1 minute counting studies will fall within what range?
433 to 567
478 to 522
495 to 505
455 to 545
What is the meaning of a t-test with a p-value of 0.05?
There is a 5% chance the claim is false
There is a strong negative correlation
There is a 5% chance the claim is true
There is a strong positive correlation
A therapy has a 30% chance of success for any treatment. Given 5 treatments, what is the probability that at most 2 treatments are successful?
0.837
0.623
0.727
0.951
5 machines require 5 minutes to produce 5 shirts. How long will it take for 100 machines to 1 g produce 100 shirts?
55 minutes
100 minutes
50 minutes
5 minutes
A radioactive sample is measured many times yielding a mean measurement of 10,000 events. Approximately what fraction of measurements yields a value between 9800 and 10200 events.
68%
95.4%
99.6%
34%
A novel radiation source has a half life of 2 days. By about what percent does the source decay in 1 hour?
5%
1%
1.4%
2.1%
An unknown isotope has an initial dose rate of 75 cGy/hr and will deliver a total lifetime dose of 7,000 cGy. What is the half life of the isotope?
2.7 days
59.4 days
32.0 days
16.7 days
