Homework
3.2                                                                                   
Name:

Due: Jan. 9

Use GSS file to analyze the following problems. Please read
Summary: SPSS for t test in the Blackboard in the Discussion
section.

Does person’s education influence his/her attitude toward gun
control? A researcher selected two groups, 1) those who oppose to,
and 2) those who were in favor of gun control. Then tested years of
education to see is there is a significant difference between the
two groups.

Open GSS and perform two-sample test and write the output
results in the space provided below:

“Favor” group

Sample size (N): ————- Mean: —————— Standard
Dev.: ——————–

“Oppose” group

Sample size (N): ———– Mean: —————- Standard
Dev.: ————————-

T value: —————-     Significance
(assuming equal variance): ——————–

Conclusion: Does person’s education a factor influencing his/her
opinion on gun control? ——–

———————————————————-

The replacement level is the amount of fertility needed to keep
the population the same from generation to generation. It refers to
the total fertility rate that will result in a stable population
without it increasing or decreasing. Demographers set the
replacement level at 2.1 children per family. At this level, the
population is said to be a stable population. Assuming that GSS is
a sample of U.S. population.

Use GSS to obtain the mean and standard deviation of number of
children in American family (childs). Perform a one-sample
“t test.” Write the results in the blank below

Mean children per family variable in the sample:
——————————-

Standard deviation of the variable
——————————

T value: ————–   
Significance:————————————

Write your conclusion: Is there a significant difference between
the sample mean of children per family and the population mean?
Why?

Is the U.S. population of a stable population? Why?