Question 1

In Liu and Srivastava's article on the U.S. Senate, which of the following is NOT one of their units of analysis?

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Question 2

In Liu and Srivastava's article on the U.S. Senate, which of the following is NOT a characteristic of their senator dyads?

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Question 3

In their article on the changing prison population, Porter and her co-authors concentrate on which characteristic?

Accepted Answer

The article focuses on changes in the age distribution of the prison population, specifically the increase in older and elderly inmates. Race, gender, and years of education are not the main focus of the article.

Question 4

With regard to average age of prisoner, Porter found that the median age had _______ the mean age.

Accepted Answer

The median age nearly catching up to the mean age suggests that the distribution of ages is becoming more symmetrical, with fewer younger or older outliers affecting the mean.

Question 5

A group of nine employees have a mean income of 50 thousand dollars, and the median income is 50 thousand dollars as well. A tenth employee is introduced into the mix, and this employee has an income of 100 thousand dollars. If you have enough information to find the new mean, then do so. If you don't have enough information to find the new mean, explain why. If you have enough information to find the new median, then do so. If you don't have enough information to find the new median, explain why.

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The answer of A group of nine employees have a...

Question 6

Here are some statistics using GSS2008 data:
 $\begin{array}{l}
\text { RACE OF RESPONDENT }\
\begin{array}{ll}
\mathrm{N} & 2023 \
\text { Mean } & 1.32 \
\text { Median } & 1.00 \
\text { Mode } & 1.00 \
\text { Standard Deviation } & .631 \
\text { Variance } & .399
\end{array}
\end{array}$ Explain what is wrong with this output.

Accepted Answer

The answer of Here are some statistics using GSS2008 data:
...

Question 7

At a business, we find that, even though the mean salary for males and females is the same, the male employees' salary variance is 100, while the female employee's salary variance is 25. Describe what this tells us.

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The answer of At a business, we find that, even...

Question 8

Here are some statistics using GSS2008 data for a variable "number of times respondent goes to a bar per month", using only black respondents who are in their 20s:
 $\begin{array}{lcc}
&\text { BLACK MALES }& \text { BLACK FEMALES }\
\mathrm{n} & 15 & 28 \
\text { Median } & 1.00 & .25 \
\text { Mean } & 4.00 & 1.39 \
\text { Standard Deviation } & 5.12 & 3.10
\end{array}$ Contrast these two groups with regard to skewness and variation.

Accepted Answer

The answer of Here are some statistics using GSS2008 data...

Question 9

Here are some statistics using GSS2008 data for a variable "number of weeks the respondent worked last year", using only respondents who are in their 40s:
 $\begin{array}{lcc} 
& \text { MALES } & \text { FEMALES } \
\text { Median } & 52.00 & 52.00 \
\text { Mean } & 45.97 & 37.68 \
\text { Standard Deviation } & 13.43 & 21.08
\end{array}$ Contrast these two groups with regard to skewness and variation.

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The answer of Here are some statistics using GSS2008 data...

Question 10

At a business, we find that the male employees' salary distribution is positively skewed, while the female employees' salary distribution is negatively skewed. Describe what this tells us.

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Question 11

A group of nine employees have a mean income of 50 thousand dollars, with a standard deviation of 10 thousand dollars. Four more employees are introduced into the mix, and these employees each have an income of 50 thousand dollars. Find the new standard deviation.

Accepted Answer

The answer of A group of nine employees have a...

Question 12

Here are GSS2008 data on the variable called BABIES (number of household members less than 6 years old) for respondents aged 20 to 29:
 $\begin{array}{lc}
\text { Number of household members less than } 6 \text { years old: } & \text { Frequency } \
0 & 216 \
1 & 59 \
2 & 36 \
3 & 6 \
4 & 2
\end{array}$ Describe the "uniqueness" of someone who has 4 household members less than 6 years old.

Accepted Answer

The answer of Here are GSS2008 data on the variable...

Question 13

A new set of variables in the 2008 GSS involved whether an anti-American Muslim clergyman should be allowed to do certain things. Here are the frequencies for these three variables:
 $\begin{array}{l}

\begin{array}{ccc}
&\text { Should be allowed... } & \text { Should not be allowed... }\
\text {..to teach at college } & 405 & 916 \
\text {...to make public speech } & 567 & 761 \
\text {...to have anti-American } & 663 & 662 \
\text { book in library } & &
\end{array}
\end{array}$ By calculating the IQV for each of the three variables, describe the differing amounts of variation in these attitudes.

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Question 14

You have a choice of moving to one of two countries: in the first, the Gini coefficient is 0, in the second, the Gini coefficient is 1. Explain the potential downside of living in each country.

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The answer of You have a choice of moving to...

Quiz 3: Summarizing Center and Diversity: Basic Descriptive Statistics