Question

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

6.A distribution of data that is zero skewed is symetrical?

True

False

7.If the mean is less than (smaller) the median, the data are
positively skewed to the right?

True

False

Answer #1

**1. TRUE**

Yes, the median is one of the measures of central tendency, along with mean and mode.

**2. TRUE**

The mean computed from ungrouped data is a more accurate measure than the mean computed from grouped data. Grouping can cause individual values to get lost in transition. Thus ungrouped data is more accurate.

**3. FALSE**

The mode is the most frequently occuring observation. Since all the observations above 3.4, 4.7, 1.9, 7.6, 6.5 are occuring only once, the mode is not defined. It is definitely not 0.

**4. FALSE**

A distribution of data that is positively skewed is right skewed and not left skewed.

**5. TRUE**

The value of Q3 can be never be less than the value of Q1.

6. **TRUE**

Yes, zero skewness implies symmetry.

7. **FALSE**

In a right skewed(positive) distribution, the mean is typically greater than the median.

Mean, median, and mode are the three measures of central
tendency that we learned about in this class. We use these to
describe the center of a distribution. For each of the following
examples please identify which measure of central tendency should
be used given the situation.
A negatively skewed distribution
A platykurtic distribution

Which measure of central tendency would you use for the
following variables (mean, median or mode). Explain your
choice.
Gender:
Class rank at a college:
Age of high school students:
A skewed income distribution (90% with incomes under $150K; a
few with incomes of several million):

1. Why do we prefer the median as a better measure of central
tendency when the data are positively/negatively skewed? Are there
times in which mean or mode should be used instead? Explain your
answer.
2. Find an article about the misuse of statistics and share what
you have learned from the article. Then, find an example of when
statistics were misused/skewed and state the reason why you think
the statistics were reported that way.
3. Maybe you have considered...

True or False, the mean is the measure of central
tendency most likely to be affected by an outliner? Explain your
reasoning.

The three commonly used measures of central tendency
are
mode, median, and mean.
percentage, midpoint, and mean.
mode, midpoint, and ratio.
median, rate, and mode.
T he purpose of univariate descriptive statistics is
to
summarize relationships between many variables.
display the essential meaning of variables measured at the
interval-ratio level.
combine nominal and discrete variables.
summarize a single variable.
The most appropriate measure of central tendency for
gender would be the
median.
mode.
mean.
None of the above
If you...

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...

choose the most appropriate measure of central
tendency (mean, median, mode) and dispersion(range, inter
quartiles, standard deviation) and whyd you choose them
a scientist is studying the effect of socioeconomic
class on the average family size. while reviewing the distribution
of the collected data, the scientist found that a large majority of
the families had two or less children while very few families had 5
or more children

Which of the following is TRUE? Select one: a. Mode is better
than mean to measure the central tendency for categorical data. b.
A data group with larger standard deviation has relatively greater
variability than another data group with smaller standard
deviation. c. Mean is always equal to median. d. Population
variance is always equal to sample variance.

answer all these questions please with the right question number
next to its letter
QUESTION 18
What is the appropriate number of classes for a frequency
distribution with 200 observations (n)?
A
5
B
6
C
7
D
8
QUESTION 19
For salaries of $152,000, $148,000, $25,000, $156,000 and
$151,000, the arithmetic mean would be an appropriate measure of
central tendency to use.
A)True
B) False
QUESTION 20
In a positively skewed distribution, the mode is greater than
the median....

Answer True or False for each of the following. If your answer
is FALSE, provide an example that proves your point. If your answer
is true, explain. Given a typical set of numerical data with an ODD
number of values.
1. The mean is always one of the data values.
2. The median is always one of the data values
3. The mode is always one of the data values.
4. The range measures the variability of the given data...

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