CHLD-3301.793 Introductory Statistics WEEK 1-7
Exam Newest 2025/2026 Complete Questions
and Correct Detailed Answers Already Graded
A+|Brand New Version
The population mean always corresponds to a z-score of zero. - CORRECT
ANSWER-true
A very bright student is described as having an IQ that is three standard deviations
above the mean. If this student's IQ is reported as a z-score, the z-score would be
_______________. - CORRECT ANSWER-3
A population distribution has = 80 and = 6. In this distribution, a z-score of z =
+2.00 identifies a location ________________ in original units (X). - CORRECT
ANSWER-12 points above the mean
,For the past 20 years, the high temperature on April 15th has averaged = 92
degrees with a standard deviation of = 4. But on the recent April 15 date, the 21st
year, the high temperature was 102 degrees. Based on this information, the
recent year's temperature on April 15th was _______________ - CORRECT
ANSWER-far above average
A positive z-score always corresponds to a score greater than the mean. -
CORRECT ANSWER-True
For a distribution of scores, which of the following z-score values represents the
location closest to the mean? - CORRECT ANSWER-z=+0.50
When a person has a z score of 1.8, for example, it means that the person's raw
score (X) equivalent is 1.8 _________________ units above the mean. -
CORRECT ANSWER-standard deviation
Men's t-shirt sizes are classified as small, medium, large, extra large, and double
extra large. This is an example of measurement on a nominal scale. - CORRECT
ANSWER-False
,If a set of exam scores forms a negatively skewed distribution, it suggests that the
majority of the students scored well on the exam (where higher scores indicate
better performance). - CORRECT ANSWER-True
The tools of descriptive statistics enable one to simplify, summarize, and organize
data. - CORRECT ANSWER-True
After measuring a sample of individuals, a researcher finds that one participant's
score is bigger than another participant's score, but the researcher can't specify
how much bigger. The measurements must come from a(n) ____ scale. -
CORRECT ANSWER-Ordinal
The class of statistical techniques that summarize, organize, and simplify data are
classified as ____________. - CORRECT ANSWER-descriptive statistics
A researcher is interested in the average of time that 9th grade boys in the United
States spend playing video games. The entire group of 9th grade male students in
the U.S.A. is an example of a _________. - CORRECT ANSWER-population
The major advantage of constructing a frequency polygon instead of a histogram
is that two or more distributions may be easily depicted on the same set of axes
when you use the polygon rather than bars. - CORRECT ANSWER-True
, In the frequency distribution where X refers to quiz scores (the number correct),
how many individuals took the quiz?
XF
15 12
14 11
13 5
12 0
11 2 - CORRECT ANSWER-30
Rating a group of large metropolitan cities in the USA in terms of "quality of life"
using ratings of
1, 2, 3, 4, and 5, with "1" reflecting the lowest quality and "5" reflecting the
highest quality, would be an example of measurement on a(n) ____________
scale of measurement. - CORRECT ANSWER-Ordinal
The ____________ is most useful for nominal data, whereas the median is more
useful with ____________ data. - CORRECT ANSWER-Mode, Skewed
Exam Newest 2025/2026 Complete Questions
and Correct Detailed Answers Already Graded
A+|Brand New Version
The population mean always corresponds to a z-score of zero. - CORRECT
ANSWER-true
A very bright student is described as having an IQ that is three standard deviations
above the mean. If this student's IQ is reported as a z-score, the z-score would be
_______________. - CORRECT ANSWER-3
A population distribution has = 80 and = 6. In this distribution, a z-score of z =
+2.00 identifies a location ________________ in original units (X). - CORRECT
ANSWER-12 points above the mean
,For the past 20 years, the high temperature on April 15th has averaged = 92
degrees with a standard deviation of = 4. But on the recent April 15 date, the 21st
year, the high temperature was 102 degrees. Based on this information, the
recent year's temperature on April 15th was _______________ - CORRECT
ANSWER-far above average
A positive z-score always corresponds to a score greater than the mean. -
CORRECT ANSWER-True
For a distribution of scores, which of the following z-score values represents the
location closest to the mean? - CORRECT ANSWER-z=+0.50
When a person has a z score of 1.8, for example, it means that the person's raw
score (X) equivalent is 1.8 _________________ units above the mean. -
CORRECT ANSWER-standard deviation
Men's t-shirt sizes are classified as small, medium, large, extra large, and double
extra large. This is an example of measurement on a nominal scale. - CORRECT
ANSWER-False
,If a set of exam scores forms a negatively skewed distribution, it suggests that the
majority of the students scored well on the exam (where higher scores indicate
better performance). - CORRECT ANSWER-True
The tools of descriptive statistics enable one to simplify, summarize, and organize
data. - CORRECT ANSWER-True
After measuring a sample of individuals, a researcher finds that one participant's
score is bigger than another participant's score, but the researcher can't specify
how much bigger. The measurements must come from a(n) ____ scale. -
CORRECT ANSWER-Ordinal
The class of statistical techniques that summarize, organize, and simplify data are
classified as ____________. - CORRECT ANSWER-descriptive statistics
A researcher is interested in the average of time that 9th grade boys in the United
States spend playing video games. The entire group of 9th grade male students in
the U.S.A. is an example of a _________. - CORRECT ANSWER-population
The major advantage of constructing a frequency polygon instead of a histogram
is that two or more distributions may be easily depicted on the same set of axes
when you use the polygon rather than bars. - CORRECT ANSWER-True
, In the frequency distribution where X refers to quiz scores (the number correct),
how many individuals took the quiz?
XF
15 12
14 11
13 5
12 0
11 2 - CORRECT ANSWER-30
Rating a group of large metropolitan cities in the USA in terms of "quality of life"
using ratings of
1, 2, 3, 4, and 5, with "1" reflecting the lowest quality and "5" reflecting the
highest quality, would be an example of measurement on a(n) ____________
scale of measurement. - CORRECT ANSWER-Ordinal
The ____________ is most useful for nominal data, whereas the median is more
useful with ____________ data. - CORRECT ANSWER-Mode, Skewed
