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Quantitative Methods > Mid-term Test Week 5 P2 #MCQ1 > Flashcards

Mid-term Test Week 5 P2 #MCQ1 Flashcards

1
Q

13/ The mean life of a particular brand of light bulb is 1000 hours and the standard deviation is 50 hours. It can be concluded that at least 75% of the bulbs will last between: #MCQ1

A. 900 and 1100 hours.

B. 950 and 1050 hours.

C. 850 and 1150 hours.

D. None of the above.

A

The mean life of a particular brand of light bulb is 1000 hours and the standard deviation is 50 hours. It can be concluded that at least 75% of the bulbs will last between: #MCQ1

A. 900 and 1100 hours.

B. 950 and 1050 hours.

C. 850 and 1150 hours.

D. None of the above.

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2
Q

14/ Consider the following Ogive which plots cumulative relative frequency against the ages of salesperson of a company. #MCQ1

What is the proportion of the salespersons who are 30 years of age or above?

  1. 0.24
  2. 0.32
  3. 0.68
  4. 0.92
A

14/ Consider the following Ogive which plots cumulative relative frequency against the ages of salesperson of a company. #MCQ1

What is the proportion of the salespersons who are 30 years of age or above?

  1. 0.24
  2. 0.32
  3. 0.68
  4. 0.92
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4
Q

15/ Which of the following statements is true? #MCQ1

  1. The correlation coefficient is -1 if there is a perfect positive correlation between two variables.
  2. The correlation coefficient is 0 if there is a perfect positive correlation between two variables.
  3. The correlation coefficient is 0.5 if there is a perfect positive correlation between two variables.
  4. The correlation coefficient is 1 if there is a perfect positive correlation between two variables.
A

Which of the following statements is true? #MCQ1

  1. The correlation coefficient is -1 if there is a perfect positive correlation between two variables.
  2. The correlation coefficient is 0 if there is a perfect positive correlation between two variables.
  3. The correlation coefficient is 0.5 if there is a perfect positive correlation between two variables.
  4. The correlation coefficient is 1 if there is a perfect positive correlation between two variables.
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5
Q

16/ Which measure of variability is appropriate when a sample is likely to contain one or several extreme values? #MCQ1

  1. The variance.
  2. The mean.
  3. The median.
  4. The interquartile range.
A

16/ Which measure of variability is appropriate when a sample is likely to contain one or several extreme values? #MCQ1

  1. The variance.
  2. The mean.
  3. The median.
  4. The interquartile range.
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6
Q

17/ The collection of all possible outcomes of an experiment is called: #MCQ1

  1. A simple event
  2. A sample space
  3. A sample
  4. A population
A

18/ The collection of all possible outcomes of an experiment is called: #MCQ1

  1. A simple event
  2. A sample space
  3. A sample
  4. A population
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7
Q

18/ Of the last 1000 customers entering a supermarket, 500 have purchased a wireless phone. If the relative frequency approach for assigning probabilities is used, the probability that the next customer will purchase a wireless phone is predicted to be: #MCQ1

  1. 0.5
  2. 0.20
  3. 0.05
  4. Cannot be determined from the information given
A

18/ Of the last 1000 customers entering a supermarket, 500 have purchased a wireless phone. If the relative frequency approach for assigning probabilities is used, the probability that the next customer will purchase a wireless phone is predicted to be: #MCQ1

  1. 0.5
  2. 0.20
  3. 0.05
  4. Cannot be determined from the information given
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8
Q

19/ If an experiment consists of five outcomes with P(O1) = 0.10, P(O2) = 0.20, P(O3) = 0.30, P(O4) = 0.20, then P(O5) is: #MCQ1

  1. 0.15
  2. 0.20
  3. 0.50
  4. Cannot be determined from the information given.
A

19/ If an experiment consists of five outcomes with P(O1) = 0.10, P(O2) = 0.20, P(O3) = 0.30, P(O4) = 0.20, then P(O5) is: #MCQ1

  1. 0.15
  2. 0.20
  3. 0.50
  4. Cannot be determined from the information given.
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9
Q

20/ An international aerospace company has submitted bids on two separate federal government defence contracts, A and B. The company feels that it has a 50% chance of winning contract A and a 30% chance of winning contract B. If the company wins contract B then the company believes it has a 60% chance of winning contract A. What is the probability that the company will win both contracts? #MCQ1

  1. 50%
  2. 20%
  3. 18%
  4. Cannot be determined from the information given.
A

20/ An international aerospace company has submitted bids on two separate federal government defence contracts, A and B. The company feels that it has a 50% chance of winning contract A and a 30% chance of winning contract B. If the company wins contract B then the company believes it has a 60% chance of winning contract A. What is the probability that the company will win both contracts? #MCQ1

  1. 50%
  2. 20%
  3. 18%
  4. Cannot be determined from the information given.
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10
Q

21/ An international aerospace company has submitted bids on two separate federal government defence contracts, A and B. The company feels that it has a 50% chance of winning contract A and a 30% chance of winning contract B. If the company wins contract B then the company believes it has a 60% chance of winning contract A. If the company wins contract B, what is the probability that it will not win contract A? #MCQ1

  1. 80%
  2. 50%
  3. 40%
  4. Cannot be determined from the information given.
A

21/ An international aerospace company has submitted bids on two separate federal government defence contracts, A and B. The company feels that it has a 50% chance of winning contract A and a 30% chance of winning contract B. If the company wins contract B then the company believes it has a 60% chance of winning contract A. If the company wins contract B, what is the probability that it will not win contract A? #MCQ1

  1. 80%
  2. 50%
  3. 40%
  4. Cannot be determined from the information given.
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Quantitative Methods (11 decks)

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