19. An advantage of the interquartile range (IQR) over the range (R) is that it a. can be used for nominal level variables. b. includes the most extreme scores c. is based on only the middle 50% of the scores d. ignores the first and third quartiles
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
![|19. An advantage of the interquartile range (IQR) over the range (R) is that it
| a. can be used for nominal level variables.
b. includes the most extreme scores
|c. is based on only the middle 50% of the scores
|d. ignores the first and third quartiles
20. The distance between a score and the mean is called
a. the deviation score
b. the difference score
c. the range
d. the summation](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd7f8a686-44e2-4125-9074-1a6b52ee4a4d%2Fe302e763-8c76-4c78-9e1e-58206a938f12%2Ftwlpnto_processed.png&w=3840&q=75)
![21. Since computation of the standard deviation requires addition, division, and other mathematical operations, it should only be used for
a. interval-ratio level variables
b. non-continuous variables at any level of measurement
c. nominal level variables
|d. discrete variables only
22. As a distribution of scores becomes more variable, the value of the standard deviation
a. decreases
b. stays the same
c. increases
| d. becomes unpredictable
23. If male and female college students have the same mean GPA but the standard deviation for females is much larger, you may conclude that
a. males are smarter than females
b. modal GPAS for both groups would be the same
c. median GPAS for both groups would be the same
| d. there is more variability among female students with respect to GPA
24. The sampling distribution is the theoretical distribution of all possible sample statistics, like a mean, that can be drawn from a population.
a. true
b. false
25. The mean of a population is referred to in statistical terms as
a. gamma (G)
b. mu (u)
c. rho (p)
|d. pi (x)
26. The standard deviation of a population is referred to in statistical terms as
a. phi (0)
b. chi (x)
c. sigma (6)
d. beta (B)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd7f8a686-44e2-4125-9074-1a6b52ee4a4d%2Fe302e763-8c76-4c78-9e1e-58206a938f12%2F423a72_processed.png&w=3840&q=75)
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