Question

Which of the following would indicate that a distribution is likely to be positively skewed?

the median equals the mean |
||

the distance between the minimum and median is greater than the distance from the median to the maximum |
||

the distance between the minimum and first quartile is less than the distance between the third quartile and the maximum |
||

the median is greater than the mean |
||

the distance between the third quartile and the maximum is less than the distance between the minimum and the first quartile |
||

the distance between the median and maximum is greater than the distance from the minimum to the median |
||

the mean is greater than the median |

Answer #1

a) Which of the following is least affected if an extreme high
outlier is added to your data?
A. The median.
B. The mean.
C. The standard deviation.
D. None of the above.
(b) If a distribution is skewed to the right,
A. the mean is less than the median.
B. the mean and median are equal.
C. the mean is greater than the median.
D. None of the above.
(c) What percent of the observations in a distribution lie...

In a positively skewed distribution:
a.
the median is less than the mean.
b.
the median equals the mean.
c.
the median is larger than the mean.
d.
the mean can be larger or smaller than the median.
What is the mean of x, given the function below?
f(x) =(1/10)
e-x/10
x 0
a.
100
b.
1,000
c.
10
d.
0.10
The starting salaries of individuals with an MBA degree are
normally distributed with a mean of $40,000 and a...

which of the following is true for normal probability
distribution?
The distribution is right skewed when the mean is greater than
100
The probability of X being between two particular values is
equivalent to the under the density curve between the two
particulars value.
The density curve can appear above and below the x axis
The probability that X=x can be any value between 0 and 1

Emissions of sulfur dioxide by industry set off chemical changes
in the atmosphere that result in "acid rain." The acidity of
liquids is measured by pH on a scale of 0 to 14. Distilled water
has pH 7.0, and lower pH values indicate acidity. Normal rain is
somewhat acidic, so acid rain is sometimes defined as rainfall with
a pH below 5.0.
A sample of 105 rainwater specimens had mean pH 5.43; standard
deviation 0.54; and five‑number summary 4.33, 5.05,...

Are these true and false correct?
__F___
20. In a sample of n = 3 scores, if two scores are each
below the mean by 2 points, then the third score is above the mean
by 4 points.
__F___
21. A sample has n = 5 scores: 2, 4, 5, 8, and 11. The
median for the sample is 6.5.
__T___ 22. There are situations for
which it is either impossible to compute a mean or the mean does
not...

The National Health Statistics Reports dated Oct. 22, 2008,
stated that for a sample size of 277 18-year-old American males,
the sample mean waist circumference was 86.3 cm. A somewhat
complicated method was used to estimate various population
percentiles, resulting in the following values.
5th
10th
25th
50th
75th
90th
95th
69.6
70.9
75.2
81.3
95.4
107.1
116.4
(a)
Is it plausible that the waist size distribution is at least
approximately normal? Explain your reasoning.
Since the mean and median...

1.The median is a measure of central tendency (or
location)?
True
False
2,The mean computed from ungrouped data is a more accurate measure
than the mean computed from grouped data?
True
False
3.The mode for the following values is "0"?...3.4, 4.7, 1.9,
7.6, 6.5.
True
False
4.A distribution of data that is positively skewed is left
skewed?
True
False
5.In a numerical batch of data the value of "Q3" can never be
smaller than the value of "Q1"?
True
False ...

Suppose a simple random sample of size nequals36 is obtained
from a population that is skewed right with mu equals 81 and sigma
equals 6.
(a) Describe the sampling distribution of x overbar.
(b) What is Upper P left parenthesis x overbar greater than
82.1 right parenthesis?
(c) What is Upper P left parenthesis x overbar less than or
equals 78.5 right parenthesis?
(d) What is Upper P left parenthesis 79.9 less than x overbar
less than 82.65 right parenthesis?...

Suppose you have access to data from a skewed distribution.
Answer the following true/false questions.
A.) A five-number summary is typically better at representing
the center and spread of the distribution than the mean and
standard deviation.
B.) It is not possible for the standard deviation to be larger
than the median
C.) If we add 100 to every point in our data set the IQR will
change, but the standard deviation will remain the same.
D.) If we...

what type of distribution is described by the following
information?
Mean= 8.5 Median=9.0 Mode=10
A. (Left) negatively skewed
B. Symmetrical (Normal)
C. Bimodal
D. (Right) positively skewed
The mean IQ score of adults is 100, with a standard deviation
of 15. Use the empirical rule to find the percentage of adults with
scores between 70 and 130. ( Assume the data set has a bell shaped
distribution.).
A. 99.7%
B. 100%
c. 95%
D. 68%
The distances (in miles) driven...

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