In: Statistics and Probability
Several years ago the proportion of Americans aged 18 - 24 who
invested in the stock market was 0.20. A random sample of 25
Americans in this age group was recently taken. They were asked
whether or not they invested in the stock market. The results
follow:
yes |
no |
no |
yes |
no |
|
no |
yes |
no |
no |
yes |
|
no |
no |
no |
no |
no |
|
no |
yes |
no |
yes |
no |
|
No |
no |
yes |
no |
no |
At a .05 level of significance, use Excel to determine whether or
not the proportion of Americans 18 - 24 years old that invest in
the stock market has changed.