Full Test Bank Variability: The law Of Life Chapter 5 - Statistics in Context 1e | Final Test Bank Blatchley by Barbara Blatchley. DOCX document preview.
Chapter 5 Test Bank
Test Bank
Type: true-false
Title: Chapter 05 Question 01
1. True or False: In a dataset with 10 observations, the range is a measure of variability that takes all 10 into account
Feedback: Page reference: p11
a) True
b) False
Type: true-false
Title: Chapter 05 Question 02
2. True or False: The range only takes two data points into account
Feedback: Page reference: p6, 7
a) True
b) False
Type: true-false
Title: Chapter 05 Question 03
3. True or False: large variability will lead to a small standard deviation
Feedback: Page reference: p11
a) True
b) False
Type: true-false
Title: Chapter 05 Question 04
4. The interquartile range is the difference between the score in the 75th percentile and the 25th percentile.
Feedback: Page reference: p6, 7, 8
a) True
b) False
Type: true-false
Title: Chapter 05 Question 05
5. True or false: Measurement error can be due to issues with the instrument that is being used. Feedback: Page reference: p5
a) True
b) False
Type: true-false
Title: Chapter 05 Question 06
6. True or False: The range rule suggests that the standard deviation is roughly the range divided by 4
Feedback: Page reference: p17
a) True
b) False
Type: true-false
Title: Chapter 05 Question 07
7. True or False: The variance is the square of the standard deviation
Feedback: Page reference: 11, 12
a) True
b) False
Type: true-false
Title: Chapter 05 Question 08
8. True or False: If you calculate the sum of deviation scores from each data point in a dataset from the mean of the dataset, you will always end up with a sum of 0.
Feedback: Page reference: p11, 12
a) True
b) False
Type: true-false
Title: Chapter 05 Question 09
9. True or false: Standard deviation and variance are both measures of variability, but standard deviation is a better measure because it takes into account all data points where as the variance only takes into account half of the data points
Feedback: Page reference: p11, 12, 13, 14
a) True
b) False
Type: true-false
Title: Chapter 05 Question 10
10. True or false: In the data set: 15, 14, 10, 18, 9, 22, 28, 39, 11, the range is 48.
Feedback: Page reference: p6, 7
a) True
b) False
Type: true-false
Title: Chapter 05 Question 11
11. True or false: “Measurement error” in science refers to a discrepancy between the observed value and the true value
Feedback: Page reference: p4, 5
a) True
b) False
Type: true-false
Title: Chapter 05 Question 12
12. True or False: Fisher states that a good statistic should be simple, novel, and controlled
Feedback: Page reference: p20
a) True
b) False
Type: true-false
Title: Chapter 05 Question 13
13. True or False: The variance is the average absolute deviation score from the mean
Feedback: Page reference: p12, 13
a) True
b) False
Type: true-false
Title: Chapter 05 Question 14
14. True or False: If the range of a dataset is 100, the range rule would estimate that the standard deviation is 20
Feedback: Page reference: p17
a) True
b) False
Type: true-false
Title: Chapter 05 Question 15
15. True or False: Variance can be negative
Feedback: Page reference: p9, 10 11
a) True
b) False
Type: true-false
Title: Chapter 05 Question 16
16. True or False: The standard deviation must be greater than 0
Feedback: Page reference: p12, 13
a) True
b) False
Type: true-false
Title: Chapter 05 Question 17
17. True or False: Measurement error can always be controlled for after the data have been collected
Feedback: Page reference: p4
a) True
b) False
Type: true-false
Title: Chapter 05 Question 18
18. True or False: When the variance is of a sample is 64, the standard deviation of that same sample is 32
Feedback: Page reference: p12, 13
a) True
b) False
Type: true-false
Title: Chapter 05 Question 19
19. True or False: a perfectly made measurement instrument without error is generally the current standard. Most tools can achieve this with modern technology
Feedback: Page reference: p4
a) True
b) False
Type: true-false
Title: Chapter 05 Question 20
20. True or false: two datasets can have the same range, but different variance.
Feedback: Page reference: p10, 11, 12, 13
a) True
b) False
Type: multiple choice question
Title: Chapter 05 Question 01
1. Which of the following measures is most sensitive to every data point in a dataset?
Feedback: Page reference: p11
a. The range
b. The interquartile range
c. The Variance
d. All of the above
Type: multiple choice question
Title: Chapter 05 Question 02
2. Consider the following dataset: 110, 320, 293, 284, 281, 279, 380, 227, 293, 183. What is the range of the dataset?
Feedback: Page reference: p6, 7
a. 380
b. 270
c. 183
d. 293
Type: multiple choice question
Title: Chapter 05 Question 03
3. How are the interquartile range and the range similar and different?
Feedback: Page reference: p6, 7, 8
a. Both are measures of variability that take a difference between two numbers, but the range compare two extreme values whereas the interquartile range compares the 3rd and 1st quartiles.
b. The interquartile range and range are both measures of variability, but the interquartile range is highly sensitive to every data point in the dataset whereas the range does not.
c. The interquartile range uses extreme values, and the range uses all values. Both are useful measures of mean difference
d. None of the above are correct.
Type: multiple choice question
Title: Chapter 05 Question 04
4. When variability in a dataset is _____________, we expect the data to be ___________.
Feedback: Page reference: p20
a. unknown, consistent
b. small, consistent
c. high, consistent
d. large, sufficient
Type: multiple choice question
Title: Chapter 05 Question 05
5. Which of the following describe the standard deviation?
Feedback: Page reference: p12, 13, 14
a. Square root of the sum of deviation scores from the mean.
b. Square root of the average squared deviation from the mean.
c. Square root of the sum of square deviation from the mean
d. The average deviation from the mean.
Type: multiple choice question
Title: Chapter 05 Question 06
6. Imagine a data set with 10 observations. If each observation increases by 10 (i.e., add 10 to each data point), which of the following will happen to the standard deviation?
Feedback: Page reference: p12, 13, 14
a. The amount of variability stays the same. So the standard deviation will be the same value.
b. The variability stays the same. But because the value of each data point is larger, the standard deviation will also increase by 10.
c. The standard deviation will increase, but it not in a systematic way that can be described.
d. The standard deviation will be 10 times the original value.
Type: multiple choice question
Title: Chapter 05 Question 07
7. How is measurement error best described?
Feedback: Page reference: p5
a. Measure error only exists for psychological research because we are measuring constructs that are hard to observe.
b. State of the art equipment and measurement tools will not have any measurement error.
c. Measurement error is often unavoidable.
d. All of the above.
Type: multiple choice question
Title: Chapter 05 Question 08
8. Measurement errors can be…
Feedback: Page reference: p4
a. Easily accounted for after data have been collected.
b. beyond a researcher’s control.
c. Minimized if the sample is sufficiently small
d. all of the above
Type: multiple choice question
Title: Chapter 05 Question 09
9. The range is a form of…?
Feedback: Page reference: p6, 7, 8
a. central tendency
b. inferential statistic
c. measure of variability
d. nominal scale data
Type: multiple choice question
Title: Chapter 05 Question 10
10. The range is best described as…:
Feedback: Page reference: p6, 7, 8
a. The average variability
b. the distance from each point to the mean
c. The distance from a dataset’s maximum value to its minimum value
d. a highly sensitive measure of variability in a dataset
Type: multiple choice question
Title: Chapter 05 Question 11
11. In a town, there are two candy factories. Over the course of the year, they log the number of pounds of candy they produce a day. Factory A has a range of 5000 and a standard deviation of 500. Factory B has a range of 7000 and a standard deviation of 600. Which of the following is true?
Feedback: Page reference: p6, 7
a. The maximum number of candy produced on any given day is larger in factory B than factory A.
b. Factory B has greater variability in their candy production than factory A
c. Factory B has less variability in their candy production than factory A
d. Factory A produced less candy than factory B in the year.
Type: multiple choice question
Title: Chapter 05 Question 12
12. If two datasets have the same range, then… ?
Feedback: Page reference: p6, 7
a. They have the same maximum and minimum value.
b. The have the same variance
c. They have the same interquartile range
d. none of the above.
Type: multiple choice question
Title: Chapter 05 Question 13
13. Which of the following is true regarding variability and range?
Feedback: Page reference: p6, 7
a. Range and interquartile range are equally sensitive measures of variability when compared to the variance and standard deviation
b. The range is not a sensitive measure of variability, but the interquartile range is sensitive to every data point in a dataset, in the same way that the variance and standard deviation are.
c. The variance of a dataset is sensitive to every data point in the dataset, but the range is not.
d. None of the above is true.
Type: multiple choice question
Title: Chapter 05 Question 14
14. Why do we use the sum of squared deviation scores from the mean and not sum of deviation scores when calculating the variance?
Feedback: Page reference: p11, 12
a. The sum of deviation scores will always be zero.
b. The sum of deviation scores is not a valid.
c. The sum of deviation scores is used when calculating from the mode
d. All of the above
Type: multiple choice question
Title: Chapter 05 Question 15
15. Why is it generally the case that one does not use the range to describe a dataset, but instead the standard deviation?
Feedback: Page reference: p7, 8, 9, 10, 11, 12
a. The range is not a measure of variability.
b. The range only takes into account two extreme values in a dataset
c. The range is too sensitive to the middle of the data
d. Both a and c.
Type: multiple choice question
Title: Chapter 05 Question 16
16. To obtain the standard deviation, what is the correct procedure?.
Feedback: Page reference: p12, 13, 14
a. Square the variance
b. Square root of the variance
c. Subtract each score from the mean, and divide it by the sample size
d. Half the variance
Type: multiple choice question
Title: Chapter 05 Question 17
17. The average squared deviation from the mean is the __________ of a dataset
Feedback: Page reference: p12, 13
a. standard deviation
b. variance
c. range
d. standard error
Type: multiple choice question
Title: Chapter 05 Question 18
18. If the variance of a dataset is 16, what is the standard deviation?
Feedback: Page reference: p12, 13, 14
a. 4
b. 16
c. 2
d. 8
Type: multiple choice question
Title: Chapter 05 Question 19
19. If the standard deviation of a sample is 15, the variance would be?
Feedback: Page reference: p12, 13, 14
a. 225
b. 30
c. 150
d. 3.87
Type: multiple choice question
Title: Chapter 05 Question 20
20. Imagine a dataset with 50 observations. Now imagine multiplying each score by 5. Which of the following will occur?
Feedback: Page reference: p12, 13, 14
a. the standard deviation will by 5 times larger.
b. The standard deviation will increase, but unpredictably
c. The standard deviation will not change
d. The standard deviation will increase by 25 times.
Type: multiple choice question
Title: Chapter 05 Question 21
21. How does the population variance and sample variance differ?
Feedback: Page reference: p14
a. The population variance is always larger.
b. If you have a dataset and do both calculations, the population variance will always be smaller
c. With the same dataset, calculating the population variance will always be a better estimate of the sample standard deviation than if you had calculated the sample variance.
d. The sample variance is the square root of the population variance.
Type: multiple choice question
Title: Chapter 05 Question 22
22. Which of the following is not possible, given the formula of the variance?
Feedback: Page reference: p12, 13, 14
a. obtaining a variance that is larger than the range
b. obtaining a negative variance
c. obtaining a variance that is smaller than the mean
d. All of the above
Type: multiple choice question
Title: Chapter 05 Question 23
23. Which of the following are the necessary components to obtain the standard deviation of a dataset?
Feedback: Page reference: p12, 13, 14
a. The range and sample size
b. The mean and the sample size
c. Half of a dataset
d. The variance
Type: multiple choice question
Title: Chapter 05 Question 24
24. The Interquartile Range (IQR) is generally better than the range as a measure of variability because...
Feedback: Page reference: p7
a. It takes more of how the data is into account
b. It is less focused on extreme values
c. The IQR uses data closer to the center of the dataset
d. All of the above
Type: multiple choice question
Title: Chapter 05 Question 25
25. The mean of a dataset is 8, what is the deviation score for an individual who scored 3?
Feedback: Page reference: p11, 12
a. -5
b. 5
c. 11
d. 25
Type: essay/short answer question
Title: Chapter 05 Question 01
1. Below is a dataset showing the number of steps from a population of toddlers when completing a maze:
114, 180, 194, 280, 297, 240, 266, 217, 288, 293, 283, 255, 219, 140, 130, 160
What is the range of the data?
Type: essay/short answer question
Title: Chapter 05 Question 02
2. Below is a dataset showing the number of steps from a population of toddlers when completing a maze:
114, 180, 194, 280, 297, 240, 266, 217, 288, 293, 283, 255, 219, 140, 130, 160
What is the interquartile range?
Type: essay/short answer question
Title: Chapter 05 Question 03
3. Below is a dataset showing the number of steps from a population of toddlers when completing a maze:
114, 180, 194, 280, 297, 240, 266, 217, 288, 293, 283, 255, 219, 140, 130, 160
What is the population variance?
Type: essay/short answer question
Title: Chapter 05 Question 04
4. Below is a dataset showing the number of steps from a population of toddlers when completing a maze:
114, 180, 194, 280, 297, 240, 266, 217, 288, 293, 283, 255, 219, 140, 130, 160
What is the population standard deviation?
Type: essay/short answer question
Title: Chapter 05 Question 05
5. Explain why the variance uses the sum of squared deviation scores from the mean, as opposed to merely the sum of deviation scores from the mean.
Type: essay/short answer question
Title: Chapter 05 Question 06
6. What is the range rule?
Type: essay/short answer question
Title: Chapter 05 Question 07
7. Fisher stated that the standard deviation is a good statistic based on three qualities. What are they, and what do they each mean, in the context of the standard deviation?
Type: essay/short answer question
Title: Chapter 05 Question 08
8. Consider the following data of IQ scores:
99, 111, 95, 94, 104, 101, 96, 110, 87, 100, 115
what is the range?
Type: essay/short answer question
Title: Chapter 05 Question 09
9. Consider the following data of IQ scores:
99, 111, 95, 94, 104, 101, 96, 110, 87, 100, 115
Based on the range, what is the estimated standard deviation?
Type: essay/short answer question
Title: Chapter 05 Question 10
10. Consider the following data of IQ scores:
99, 111, 95, 94, 104, 101, 96, 110, 87, 100, 115
What is the actual standard deviation (assuming that this is the population)?
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Statistics in Context 1e | Final Test Bank Blatchley
By Barbara Blatchley