7. A recent Iowa straw poll for the Democratic Primary found thefollowing number of supporters for these candidates (ObservedFrequencies).
Elizabeth Warren | Bernie Sanders | Joe Biden | Pete Buttigieg |
20 | 25 | 10 | 25 |
a) Specify the null and alternative hypotheses for a chi-squareGoodness of Fit test of candidate preference.
b) Fill in the table below with the expected frequencies.
Elizabeth Warren | Bernie Sanders | Joe Biden | Pete Buttigieg |
| | | |
c) Use the observed and expected frequencies to calculate achi-square Goodness of Fit test to decide if people in Iowa have apreference for any of the candidates, using alpha = .05. Report thecritical value and your decision.
