This Question: 1 pt 2 of 30 (1 complete) ▼ This Test: 30 pts possible !Question Help A clinical test on humans of a new drug is normally done in three phases. Phase I is conducted with a relatively small number of healthy volunteers. For example, a phase I test of a specific drug involved only 8 subjects. Assume that we want to treat 8 healthy humans with this new drug and we have 12 suitable volunteers available. Complete parts (a) through (c) below. a. If the subjects are selected and treated in sequence, so that the trial is discontinued if anyone displays adverse effects, how many different sequential arrangements are possible if 8 people are selected from the 12 that are available? Choose the correct answer-below. O A. 19,958,400 O B. 40,320 O C. 479,001,600 O D. 495 b. If 8 subjects are selected from the 12 that are available, and the 8 selected subjects are all treated at the same time, how many different treatment groups are possible? There are different treatment groups possible. c. If 8 subjects are randomly selected and treated at the same time, what is the probability of selecting the 8 youngest subjects? P(selecting the 8 youngest subjects) = (Type an integer or a simplified fraction ) 12 of 30 (1 complete) ▼ This Test: 30 pts possible RUESLIOI. Question Help A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 50.0 and 52.0 minutes. Find the probability that a given class period runs between 51.25 and 51.5 minutes. Find the probability of selecting a class that runs between 51.25 and 51.5 minutes. (Round to three decimal places as needed.)

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This Test: 30 pts possible
!Question Help
A clinical test on humans of a new drug is normally done in three phases. Phase I is conducted with a relatively small number of healthy volunteers. For example, a phase I test of a specific drug involved only 8 subjects. Assume that
we want to treat 8 healthy humans with this new drug and we have 12 suitable volunteers available. Complete parts (a) through (c) below.
a. If the subjects are selected and treated in sequence, so that the trial is discontinued if anyone displays adverse effects, how many different sequential arrangements are possible if 8 people are selected from the 12 that are
available? Choose the correct answer-below.
O A. 19,958,400
O B. 40,320
O C. 479,001,600
O D. 495
b. If 8 subjects are selected from the 12 that are available, and the 8 selected subjects are all treated at the same time, how many different treatment groups are possible?
There are
different treatment groups possible.
c. If 8 subjects are randomly selected and treated at the same time, what is the probability of selecting the 8 youngest subjects?
P(selecting the 8 youngest subjects) = (Type an integer or a simplified fraction )
Transcribed Image Text:This Question: 1 pt 2 of 30 (1 complete) ▼ This Test: 30 pts possible !Question Help A clinical test on humans of a new drug is normally done in three phases. Phase I is conducted with a relatively small number of healthy volunteers. For example, a phase I test of a specific drug involved only 8 subjects. Assume that we want to treat 8 healthy humans with this new drug and we have 12 suitable volunteers available. Complete parts (a) through (c) below. a. If the subjects are selected and treated in sequence, so that the trial is discontinued if anyone displays adverse effects, how many different sequential arrangements are possible if 8 people are selected from the 12 that are available? Choose the correct answer-below. O A. 19,958,400 O B. 40,320 O C. 479,001,600 O D. 495 b. If 8 subjects are selected from the 12 that are available, and the 8 selected subjects are all treated at the same time, how many different treatment groups are possible? There are different treatment groups possible. c. If 8 subjects are randomly selected and treated at the same time, what is the probability of selecting the 8 youngest subjects? P(selecting the 8 youngest subjects) = (Type an integer or a simplified fraction )
12 of 30 (1 complete) ▼
This Test: 30 pts possible
RUESLIOI.
Question Help
A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 50.0 and 52.0 minutes. Find the probability that a given class period runs between 51.25 and 51.5 minutes.
Find the probability of selecting a class that runs between 51.25 and 51.5 minutes.
(Round to three decimal places as needed.)
Transcribed Image Text:12 of 30 (1 complete) ▼ This Test: 30 pts possible RUESLIOI. Question Help A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 50.0 and 52.0 minutes. Find the probability that a given class period runs between 51.25 and 51.5 minutes. Find the probability of selecting a class that runs between 51.25 and 51.5 minutes. (Round to three decimal places as needed.)
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