1. The classical approach to probability requires that the outcomes are _______.
Answer
Correct Answer:
Equally likely
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2. In a probability histogram, there is a correspondence between _______.
Answer
Correct Answer:
Random Variable
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3. This is an arrangement of data, usually in rows and columns. it is called a ___.
Answer
Correct Answer:
Trend
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4. Selections made with replacement are considered to be _______.
Answer
Correct Answer:
Independent
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5. As the margin of error decreases, the width of the confidence interval _______________.
Answer
Correct Answer:
Decreases
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6. As the degrees of freedom increase, the t distribution approaches the _____ distribution.
Answer
Correct Answer:
Normal
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7. An individual at the 50th percentile would have a z score of ______.
Answer
Correct Answer:
Zero
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8. The quality of a normal curve that is relatively ____ compared with a normal distribution.
Answer
Correct Answer:
Peaked
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9. The quality of a normal curve that is relatively ____ compared with a normal distribution.
Answer
Correct Answer:
Flat
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10. The quality of a distribution that defines how flat or peaked it is called
Answer
Correct Answer:
Kurtosis
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11. The quality of a distribution that defines the disproportionate frequency of certain scores is called
Answer
Correct Answer:
Skewness
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12. Z score is standard scores
Answer
Correct Answer:
True
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13. A raw score that is adjusted for the mean and standard deviation of the distribution from which the raw score comes is called
Answer
Correct Answer:
Z score
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14. The quality of the normal curve such that the tails never touch the horizontal axis is called
Answer
Correct Answer:
Asymptotic
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15. A distribution of ____ that is symmetrical about the mean, the median, and the mode and has asymptotic tails is bell shaped curve.
Answer
Correct Answer:
Scores
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16. Which type of shaped curve is normal curve?
Answer
Correct Answer:
Bell shaped
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17. Faculty in the psychology department at State University consume an average of 5 cups of coffee per day with a standard deviation of 1.5. The distribution is normal. What proportion of faculty consumes an amount between 4 and 6 cups?
Answer
Correct Answer:
0.4972
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18. What percentage of scores falls within three standard deviation of the mean?
Answer
Correct Answer:
99.5%
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19. If the shape of a frequency distribution is lopsided, with a long tail projecting longer to the right than to the left, how would the distribution be skewed?
Answer
Correct Answer:
Positively
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20. Faculty in the psychology department at State University consumes an average of 5 cups of coffee per day with a standard deviation of 1.5. The distribution is normal. What is the percentile rank for an individual who consumed 8 cups of coffee per day?
Answer
Correct Answer:
97.72
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21. When a z-score is NOT in the region of rejection, we should ______.
Answer
Correct Answer:
Not reject the idea that the sample represents the raw score population
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22. When a z-score is NOT in the region of rejection, we should ______.
Answer
Correct Answer:
Not reject the idea that the sample represents the raw score population
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23. A z score is a standard score with a:
Answer
Correct Answer:
M = 0 and SD = 1
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24. If the shape of a frequency distribution is lopsided, with a long tail projecting longer to the left than to the right, how would the distribution be skewed?
Answer
Correct Answer:
Negatively
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25. If the probability of getting a z-score between the mean of +1 standard deviation is 0.3413, what is the probability of getting a z-score of +1 standard deviation or less?
Answer
Correct Answer:
0.8413
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26. If Joe scored 25 on a test with a mean of 20 and a standard deviation of 5, what is his z-score?
Answer
Correct Answer:
+1.0
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27. “Asymptotic” refers to the following:
Answer
Correct Answer:
Tails of the normal curve
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28. In a negatively skewed distribution, the mean is ______ the median and ______ mode.
Answer
Correct Answer:
Less than; less than
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29. A z-score is most affected by the ______.
Answer
Correct Answer:
Standard deviation
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30. In a negatively skewed distribution, the mode is ______ the median and ______ mean.
Answer
Correct Answer:
Greater than; greater than
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31. Sue took a test in both biology and math last week. The biology test had a mean of 70 and a standard deviation of 7, whereas the math test had a mean of 75 and a standard deviation of 10. Sue scored a 76 on the biology test and a 76 on the math test. On which test did she do better in comparison to the rest of the class?
Answer
Correct Answer:
The biology test
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