Mid-term Test Week 5 #MCQ2

Question 1

1/ A company has developed a new computer microprocessor whose average lifetime is unknown. In order to estimate this average, 300 microprocessors are randomly selected from a large production line and tested; their average lifetime is found to be 7 years. The 300 microprocessors represent a:

1. parameter.
2. statistic.
3. sample.
4. population.

Answer 1

1/ A company has developed a new computer microprocessor whose average lifetime is unknown. In order to estimate this average, 300 microprocessors are randomly selected from a large production line and tested; their average lifetime is found to be 7 years. The 300 microprocessors represent a:

1. parameter.
2. statistic.
3. sample.
4. population.

Question 2

2/ Which of the following statements is false?

1. Descriptive statistics consists of graphical and numerical methods used to describe sets of data, both populations and samples.
2. A descriptive measure that is computed from a sample is called a statistic.
3. A descriptive measure that is computed from a population is called a parameter.
4. The value of a statistic will always be equal to the value of a parameter.

Answer 2

Which of the following statements is false?

1. Descriptive statistics consists of graphical and numerical methods used to describe sets of data, both populations and samples.
2. A descriptive measure that is computed from a sample is called a statistic.
3. A descriptive measure that is computed from a population is called a parameter.
4. The value of a statistic will always be equal to the value of a parameter.

Question 3

3/ Which of the following statements is true?

1. Descriptive statistics never uses graphical techniques.
2. Descriptive statistics never uses numerical techniques.
3. Statistical inference is used to describe a sample of data.
4. Statistical inference is used to draw conclusions about characteristics of populations based on sample data.

Answer 3

3/ Which of the following statements is true?

1. Descriptive statistics never uses graphical techniques.
2. Descriptive statistics never uses numerical techniques.
3. Statistical inference is used to describe a sample of data.
4. Statistical inference is used to draw conclusions about characteristics of populations based on sample data.

Question 4

4/ A university lecturer surveyed its students at the end of the semester and asked them certain questions about their experience in his subject. Some of these questions are listed below. The response to which of the following questions will not be nominal data?

1. Did you regularly meet with your group members for your assignment?
2. Did you regularly attend tutorials?
3. Are you a local or an international student?
4. What was your average score (out of 100) for the quizzes?

Answer 4

4/ A university lecturer surveyed its students at the end of the semester and asked them certain questions about their experience in his subject. Some of these questions are listed below. The response to which of the following questions will not be nominal data?

1. Did you regularly meet with your group members for your assignment?
2. Did you regularly attend tutorials?
3. Are you a local or an international student?
4. What was your average score (out of 100) for the quizzes?

Question 5

5/ A large university campus has 30,000 students. The president of the students’ association wants to conduct a survey of the students to determine their views on an increase in the student activity fee. She would like to acquire information about all the students without feeling the need to compare students’ views across faculties, gender or any other characteristics. Which of the following sampling plan will be most appropriate?

1. Simple random sampling
2. Stratified random sampling
3. Cluster sampling
4. None of the above?

Answer 5

5/ A large university campus has 30,000 students. The president of the students’ association wants to conduct a survey of the students to determine their views on an increase in the student activity fee. She would like to acquire information about all the students without feeling the need to compare students’ views across faculties, gender or any other characteristics. Which of the following sampling plan will be most appropriate?

1. Simple random sampling
2. Stratified random sampling
3. Cluster sampling
4. None of the above?

Question 6

6/ Which of the following is the proportion of the total area that must be to the right of the median, in a histogram?

1. 0.25 to 0.50
2. Less than 0.50 if the distribution is skewed to the left.
3. More than 0.50 if the distribution is skewed to the right.
4. None of the above

Answer 6

6/ Which of the following is the proportion of the total area that must be to the right of the median, in a histogram?

1. 0.25 to 0.50
2. Less than 0.50 if the distribution is skewed to the left.
3. More than 0.50 if the distribution is skewed to the right.
4. None of the above

Question 7

7/ Which of the following summary measures is affected by extreme values?

1. The median.
2. The interquartile range.
3. The range.
4. The mode.

Answer 7

7/ Which of the following summary measures is affected by extreme values?

1. The median.
2. The interquartile range.
3. The range.
4. The mode.

Question 8

8/ A data sample has a mean of 107, a median of 122 and a mode of 134. The distribution of the data is

1. positively skewed
2. negatively skewed
3. symmetric
4. unknown

Answer 8

8/ A data sample has a mean of 107, a median of 122 and a mode of 134. The distribution of the data is

1. positively skewed
2. negatively skewed
3. symmetric
4. unknown

Question 9

9/ The monthly rent paid by 10 students in shared accommodation is:

220, 216, 220, 205, 210, 240, 200, 235, 204, and 250.

Which one of the following is True?

1. the mean rent paid by the students is 220
2. The median rent paid by the students is 218
3. The mode of the data is 220.
4. All of the above are true.

Answer 9

9/ The monthly rent paid by 10 students in shared accommodation is:

220, 216, 220, 205, 210, 240, 200, 235, 204, and 250.

Which one of the following is True?

1. the mean rent paid by the students is 220
2. The median rent paid by the students is 218
3. The mode of the data is 220.
4. All of the above are true.

Question 10

10/ Which of the following is not a measure of central location?

1. The range.
2. The variance.
3. The standard deviation.
4. All of the above

Answer 10

10/ Which of the following is not a measure of central location?

1. The range.
2. The variance.
3. The standard deviation.
4. All of the above