CHLD-3301.793 Introdu tory question and verified
answers graded a+ \\pass !!!Statistics WEEK 1-7
Within any distribution of scores, the location specified by z = +1 and the location
specified by z = -1 are exactly the same distance from the mean. - answer-True
The population mean always corresponds to a z-score of zero. - 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
_______________. - answer-3
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 _______________ - answer-far above average
A population distribution has = 80 and = 6. In this distribution, a z-score of z = +2.00
identifies a location ________________ in original units (X). - answer-12 points above
the mean
A positive z-score always corresponds to a score greater than the mean. - answer-True
For a distribution of scores, which of the following z-score values represents the location
closest to the mean? - 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. - answer-standard
deviation
Last week Tom had exams in Statistics and in English. He scored 10 points above the
mean on both exams. From this information, what can you conclude? - answer-Both of
Tom's z-scores are positive
When you say that 70% of the scores were less than or equal to a particular raw score,
it follows that the raw score has a(n)_______________ of 70. - answer-percentile rank
The mean birth weight for full-term newborns in the USA is µ = 7.5 pounds. Assume that
this distribution is normal in shape and the standard deviation = 2.0. Low birth weight is
defined as a weight less than a z score of z = -1.0. What is the birth weight, in pounds,
that defines a full-term newborn as a "low birth weight"baby (that is, solve for X)? Round
to the nearest tenths place if a fraction. [Note, if your calculated value is not identical to
one of the values below, but within plus or minus 0.5 of an answer below, assume it's a
rounding error and select the answer that is closest to your calculated value.] - answer-
5.5
The Centers for Disease Control & Prevention in Maryland reports that the mean weight
(in pounds) for adult males aged 20 years and over is µ = 195. Assume that this
distribution is normal in shape and the standard deviation = 30. Find the z score for a
man with a weight of 246 pounds (that is, for X = 246). Round to the nearest tenths
place if a fraction. [Note, if your calculated value is not identical to one of the values
, below, but within plus or minus 0.2 of an answer below, assume it's a rounding error
and select the answer that is closest to your calculated value.] - answer-+1.7
For a population automobile drives in a medium-sized city (population about 100,000),
the traffic police ticketed numerous drivers speeding in school zones during school
hours. The drivers' ticketed speeds formed a normal distribution with a mean of µ = 35
(miles per hour) and ơ = 5. With these parameters, answer the associated question(s).
What is the speed someone was driving where 40 percent of the ticketed drivers were
driving at or below this speed? Round to the nearest tenths place if a fraction. - answer-
33.75
Scores on Part 1 of the statistics quiz for each of nine students are:
Scores: 0, 4, 6, 5, 9, 9, 7, 6, 2
elow, assume it's a rounding error and select the answer that is closest to your
calculated Calculate the raw score corresponding to the 40th percentile. Round to the
nearest tenths place if a fraction. The raw score is: [deleted] - answer-5
Scores on Part 1 of the statistics quiz for each of nine students are:
Scores: 0, 4, 6, 5, 9, 9, 7, 6, 2
Calculate the percentile rank for a raw score of 6. Round to the nearest tenths place if a
fraction. The percentile rank is: - answer-66.7
The shape of a given distribution is normal with a mean of 450 and a standard deviation
of 60. With these parameters, answer the associated question(s).
For these parameters, calculate the raw score (X) corresponding to a z score of z =
1.65. Round to the nearest tenths place if a fraction. The X score is: - answer-549
For a population automobile drives in a medium-sized city (population about 100,000),
the traffic police ticketed numerous drivers speeding in school zones during school
hours. The drivers' ticketed speeds formed a normal distribution with a mean of µ = 35
(miles per hour) and ơ = 5. With these parameters, answer the associated question(s).
What proportion (not percent) of the ticketed drivers were driving equal to or faster than
50 mph? - answer-.0013
The scores below are "college readiness" scores of 15 graduating high school seniors,
with higher scores indicating an individual is more ready for college in terms of
social/academic preparedness than low scores. The highest score possible is 100.
90, 94, 53, 68, 79, 84, 87, 72, 70, 69, 65, 89, 85, 83, 72
Using the percentile rank formula, Formula 1 on page 2 of Week 3 book content,
calculate the percentile rank that corresponds to a score of 87. Round to the nearest
tenths place if a fraction. The percentile rank of X = 87 is: - answer-80.0
The total number of pages in college textbooks has been found to be a normally shaped
distribution with a mean of µ = 325 pages in length, and a standard deviation = 115. If
you find that a particular textbook has a z score of z = -1.2, how many pages does it
contain (that is, solve for X)? Round to the nearest tenths place if a fraction. [Note, if
your calculated value is not identical to one of the values below, but within plus or minus
0.5 of an answer below, assume it's a rounding error and select the answer that is
closest to your calculated value.] - answer-187
answers graded a+ \\pass !!!Statistics WEEK 1-7
Within any distribution of scores, the location specified by z = +1 and the location
specified by z = -1 are exactly the same distance from the mean. - answer-True
The population mean always corresponds to a z-score of zero. - 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
_______________. - answer-3
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 _______________ - answer-far above average
A population distribution has = 80 and = 6. In this distribution, a z-score of z = +2.00
identifies a location ________________ in original units (X). - answer-12 points above
the mean
A positive z-score always corresponds to a score greater than the mean. - answer-True
For a distribution of scores, which of the following z-score values represents the location
closest to the mean? - 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. - answer-standard
deviation
Last week Tom had exams in Statistics and in English. He scored 10 points above the
mean on both exams. From this information, what can you conclude? - answer-Both of
Tom's z-scores are positive
When you say that 70% of the scores were less than or equal to a particular raw score,
it follows that the raw score has a(n)_______________ of 70. - answer-percentile rank
The mean birth weight for full-term newborns in the USA is µ = 7.5 pounds. Assume that
this distribution is normal in shape and the standard deviation = 2.0. Low birth weight is
defined as a weight less than a z score of z = -1.0. What is the birth weight, in pounds,
that defines a full-term newborn as a "low birth weight"baby (that is, solve for X)? Round
to the nearest tenths place if a fraction. [Note, if your calculated value is not identical to
one of the values below, but within plus or minus 0.5 of an answer below, assume it's a
rounding error and select the answer that is closest to your calculated value.] - answer-
5.5
The Centers for Disease Control & Prevention in Maryland reports that the mean weight
(in pounds) for adult males aged 20 years and over is µ = 195. Assume that this
distribution is normal in shape and the standard deviation = 30. Find the z score for a
man with a weight of 246 pounds (that is, for X = 246). Round to the nearest tenths
place if a fraction. [Note, if your calculated value is not identical to one of the values
, below, but within plus or minus 0.2 of an answer below, assume it's a rounding error
and select the answer that is closest to your calculated value.] - answer-+1.7
For a population automobile drives in a medium-sized city (population about 100,000),
the traffic police ticketed numerous drivers speeding in school zones during school
hours. The drivers' ticketed speeds formed a normal distribution with a mean of µ = 35
(miles per hour) and ơ = 5. With these parameters, answer the associated question(s).
What is the speed someone was driving where 40 percent of the ticketed drivers were
driving at or below this speed? Round to the nearest tenths place if a fraction. - answer-
33.75
Scores on Part 1 of the statistics quiz for each of nine students are:
Scores: 0, 4, 6, 5, 9, 9, 7, 6, 2
elow, assume it's a rounding error and select the answer that is closest to your
calculated Calculate the raw score corresponding to the 40th percentile. Round to the
nearest tenths place if a fraction. The raw score is: [deleted] - answer-5
Scores on Part 1 of the statistics quiz for each of nine students are:
Scores: 0, 4, 6, 5, 9, 9, 7, 6, 2
Calculate the percentile rank for a raw score of 6. Round to the nearest tenths place if a
fraction. The percentile rank is: - answer-66.7
The shape of a given distribution is normal with a mean of 450 and a standard deviation
of 60. With these parameters, answer the associated question(s).
For these parameters, calculate the raw score (X) corresponding to a z score of z =
1.65. Round to the nearest tenths place if a fraction. The X score is: - answer-549
For a population automobile drives in a medium-sized city (population about 100,000),
the traffic police ticketed numerous drivers speeding in school zones during school
hours. The drivers' ticketed speeds formed a normal distribution with a mean of µ = 35
(miles per hour) and ơ = 5. With these parameters, answer the associated question(s).
What proportion (not percent) of the ticketed drivers were driving equal to or faster than
50 mph? - answer-.0013
The scores below are "college readiness" scores of 15 graduating high school seniors,
with higher scores indicating an individual is more ready for college in terms of
social/academic preparedness than low scores. The highest score possible is 100.
90, 94, 53, 68, 79, 84, 87, 72, 70, 69, 65, 89, 85, 83, 72
Using the percentile rank formula, Formula 1 on page 2 of Week 3 book content,
calculate the percentile rank that corresponds to a score of 87. Round to the nearest
tenths place if a fraction. The percentile rank of X = 87 is: - answer-80.0
The total number of pages in college textbooks has been found to be a normally shaped
distribution with a mean of µ = 325 pages in length, and a standard deviation = 115. If
you find that a particular textbook has a z score of z = -1.2, how many pages does it
contain (that is, solve for X)? Round to the nearest tenths place if a fraction. [Note, if
your calculated value is not identical to one of the values below, but within plus or minus
0.5 of an answer below, assume it's a rounding error and select the answer that is
closest to your calculated value.] - answer-187
