
MATH-CLOSE-DOOR-1
Quiz
•
Instructional Technology
•
Professional Development
•
Easy
Paul Quiniano
Used 13+ times
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50 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Form past experience it is known 90% of one years old children can distinguish their mother’s voice from the voice of similar sounding female. A random sample of 20 one years old given the voice recognize test. Find the probability that all children recognize mother’s voice.
0.122
0.500
1.200
0.222
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
From past experience, it is known 90 percent of one year’s old children can distinguish their mother’s voice of a similar sounding female. A random sample of one year’s old are given this voice recognize test. Find the standard deviation that all 20 children recognize their mother’s voice.
0.12
1.34
0.88
1.43
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
From past experience it is known 90 percent of one year old children can distinguish their mothers voice of a similar sounding female. A random sample of one year’s old are given this voice recognize test. Find the probability that at least 3 children didn’t recognize their mother’s voice.
0.677
0.323
0.729
0.271
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
From past experience, it is known 90% of one year old children can distinguish their mother voice from the voice of a similar sounding female. A random sample of 20 one year olds are given this voice recognition test. Let the random variable x denote the number of children who do not recognize their Mother's voice. Find the mean of x.
20
2
4
1
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a hotel it is known that 20% of the total reservation will be cancelled in the last minute. What is the probability that out of 15 reservation that there will be more than 8 but less than 12 will cancelled?
0.0084
0.0784
0.000784
0.784
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a hotel it is known that 20% of the hotel reservation will be cancelled in the last minute. What is the probability that there will be less than 2 reservations cancelled out of 4 reservations?
0.6498
0.5629
0.3928
0.4096
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a hotel it is known than 20% of the total reservation will be cancelled in the last minute. What is the probability that these will be fewer than 2 reservation cancelled out of 4 resevations?
0.6498
0.5629
0.3928
0.8192
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