Sample Statistic – Final Exam STATS

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Sample Statistic, SS, Sum of Squared Deviations, Mean, Variance – Exam

The key terms in these Statistic chapters include Sample, Sum of Squared Deviations, Mean, Population, Distribution, Variance, Population Variance, Sample Statistic, Standard Deviation, Sample Variance.


A sample consists of n = 16 scores. How many of the scores are used to calculate the range?

2


What is the value of SS (sum of squared deviations) for the following population? Population: 1, 1, 1, 5

12


Which of the following is a consequence of increasing variability?

The distance from one score to another tends to INCREASE, and a single score tends to provide a LESS accurate representation of the entire distribution


Which of the following symbols identifies the population of scores? Scores 5, 2, 5, 4

o


What is the VARIANCE for the following population of scores? Scores: 5, 2, 5, 4

1.5


My electric bills for June, July and August last summer were $75, $75, and $150, respectively. What was the mean amount for the three bills?

$100


A population with a mean of u = 6 has EX = 54. How many scores are in the population?

N = 9


What is the value of SS for the following set of scores? Scores 1,1, 4, 0

9


A sample has a mean of M = 90. If each score in the sample is MULTIPLIED by 5, then what is the mean for the new distribution?

450


What is the value of SS (sum of squared dev.) for the following sample? Sample: 1, 1, 1, 7

27


A set of 10 scores has SS = 90. If the scores are a sample, the sample variance is ___, and if the scores are a population, the population variance is ____.

s2 = 10; o2; = 9


A researcher takes a sample from a population and computes a statistic for the sample. Which of the following statements is correct?

If the sample statistic is EQUAL to the corresponding population parameter, then the statistic is unbiased


A population has u = 50 and 0 = 5. If 10 points are added to every score in the population, what are the new values for the mean and standard devation.

u = 60 and o = 5


A set of n = 4 scores has a mean of u = 11. If 8 points are subtraced from one of the scores, what is the new value for the population mean?

9


A sample of n = 6 scores has a mean of M = 5. One person with a score of X = 12 is added to the distribution. What is the mean for the new set of scores?

M = 6


On an exam with a mean of u = 70, you have a score of X = 75. Which of the following values for the standard deviation would give you the highest position within the class?

o = 1


One sample is selected to represent scores in treatment 1 and a second sample is used to represent scores in treatment 2. Which set of sample statistics would present the clearest picture of a real difference between the two treatments?

M1 = 36, M2 = 40, and both variances = 6


A sample consists of n = 16 scores. How many of the scores are used to calculate the range?

2


What is the value of SS (sum of squared deviations) for the following population? Population: 1, 1, 1, 5

12


Which of the following is a consequance of increasing variability?

The distance from one score to another tends to INCREASE, and a single score tends to provide a LESS accurate representation of the entire distribution


Which of the following symbols identifies the population of scores? Scores 5, 2, 5, 4

o


What is the VARIANCE for the following population of scores? Scores: 5, 2, 5, 4

1.5


My electric bills for June, July and August last summer were $75, $75, and $150, respectively. What was the mean amount for the three bills?

$100


A population with a mean of u = 6 has EX = 54. How many scores are in the population?

N = 9


What is the value of SS for the following set of scores? Scores 1,1, 4, 0

9


A sample has a mean of M = 90. If each score in the sample is MULTIPLIED by 5, then what is the mean for the new distribution?

450


What is the value of SS (sum of squared dev.) for the following sample? Sample: 1, 1, 1, 7

27


A set of 10 scores has SS = 90. If the scores are a sample, the sample variance is ___, and if the scores are a population, the population variance is ____.

s2 = 10; o2; = 9


A researcher takes a sample from a population and computes a statistic for the sample. Which of the following statements is correct?

If the sample statistic is EQUAL to the corresponding population parameter, then the statistic is unbiased


A population has u = 50 and 0 = 5. If 10 points are added to every score in the population, what are the new values for the mean and standard devation.

u = 60 and o = 5


A set of n = 4 scores has a mean of u = 11. If 8 points are subtraced from one of the scores, what is the new value for the population mean?

9


A sample of n = 6 scores has a mean of M = 5. One person with a score of X = 12 is added to the distribution. What is the mean for the new set of scores?

M = 6

On an exam with a mean of u = 70, you have a score of X = 75. Which of the following values for the standard deviation would give you the highest position within the class?

o = 1


One sample is selected to represent scores in treatment 1 and a second sample is used to represent scores in treatment 2. Which set of sample statistics would present the clearest picture of a real difference between the two treatments?

M1 = 36, M2 = 40, and both variances = 6


A sample consists of n = 16 scores. How many of the scores are used to calculate the range?

2


What is the value of SS (sum of squared deviations) for the following population? Population: 1, 1, 1, 5

12


Which of the following is a consequance of increasing variability?

The distance from one score to another tends to INCREASE, and a single score tends to provide a LESS accurate representation of the entire distribution


Which of the following symbols identifies the population of scores? Scores 5, 2, 5, 4

o


What is the VARIANCE for the following population of scores? Scores: 5, 2, 5, 4

1.5


My electric bills for June, July and August last summer were $75, $75, and $150, respectively. What was the mean amount for the three bills?

$100


A population with a mean of u = 6 has EX = 54. How many scores are in the population?

N = 9


What is the value of SS for the following set of scores? Scores 1,1, 4, 0

9


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