statistics

posted by .

2) Two individuals are running for mayor of Tallahassee. You conduct an election survey
(N = 561) a week before the election and find that 57% of the respondents prefer
candidate A. Can you predict the winner (α = 0.01)? (Hint: Use 50% as the proportion
of votes needed for a tie in a two-candidate race). [15 points]
3) A random sample of 97 Chinese Americans has finished an average of 13.5 years of
formal education with a standard deviation of 1.7 years of formal training. The national
average is 12.4 years. State a null and alternative hypothesis regarding a possible
difference in years of formal education between Chinese Americans and the whole
population? Can you reject your null hypothesis for α=0.05 (two-tailed)? [10 points]
4) The overall proportion of turnout in the previous elections was 0.43. You took a
random sample of size N =150 from a neighborhood with relatively wealthy and well
educated people. The sample proportion of voter turnout is = 0.51 S P .
a) State a null hypothesis and alternative hypothesis regarding a possible difference in
voter turnout between your sample and the whole population. [5 points]
b) Test your hypotheses (α=0.05, two-tailed). Can you reject your null hypothesis? Does
your decision change when you use α=0.01 (two-tailed) instead? [10 points]
c) Based on your research results from the first sample, you decide to take another sample
from a neighborhood with relatively poor and less educated people. The sample size is
177 2 N = and the sample proportion of voter turnout is 0.37 2 = S P . Can both samples be
treated as representatives of the same population? State a null hypothesis and alternatives
hypothesis and make a statistical test (two-tailed, for both α=0.05 and α=0.01). [15
points]
5) For 2006, a sample of SAT scores of = 1,751 female N female freshmen has mean scores
of female, verbal = 493.7
S μ for the verbal subtest and female, math = 501.2
S μ
for the math subtest,
with standard deviations s female, verbal = 99 and s female, math =111, respectively. Moreover,
the mean scores of a sample of = 2,577 male N male freshmen are male, verbal = 503.9
S μ
for
the verbal subtest and male, math = 542.9
S μ
for the math subtest, with standard deviations
smale, verbal =115 and smale, math = 95, respectively.
a) State a null hypothesis and alternative hypothesis about possible differences in scores
between the female and male samples for the verbal subtest, make a statistical test (use
α = 0.05, two-tailed) and, finally, make your decision between both hypotheses.
[15 points]
b) Do the same thing as in a), but now for the math subtest

  • statistics -

    How would you like us to help you with this complex assignment?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    A survey of 1000 registered voters revealed that 450 people would vote for candidate A in an upcoming election. If 220,000 people vote in the election, how many votes would the survey takers predict candidate A should receive?
  2. Math

    In a special local election, one candidate received 288 votes less than twice the number of votes of the opponent. How many votes did each candidate receive if the total number of votes in the election is 136,395?
  3. Probability

    Could you please explain how to do this question. Suppose that a certain candidate is running in a city election. A recent poll of 500 randomly chosen voters concludes that 60% of the voters prefer this candidate. Determine the probability …
  4. math 3Probability

    Could you please explain how to do this question. Suppose that a certain candidate is running in a city election. A recent poll of 500 randomly chosen voters concludes that 60% of the voters prefer this candidate. Determine the probability …
  5. Alg 2

    If there are 12 candidates in a city election. The winner will be the mayor and the runner up will be the vice mayor. How many different combinations of mayor and vice-mayor are possible?
  6. math

    A polling company took 5 polls in the week before and election. It showed that a mayoral candidate would get 66%, 56%, 55%, 60%, and 63% of the votes. That candidate received 64% of the total votes during the actual election. Find …
  7. math, HELP ME PLEASE!

    A polling company took 5 polls in the week before an election. It showed that a mayoral candidate would get 66%, 56%, 55%, and 63% of the voters. That candidate received 64% of the total votes during the actual election. Find the percent …
  8. Math

    A Voting Poll: Candidate A: 30% Candidate B: 50% Undecided: 20% The Table above summarizes the results of an election poll in which 4000 voters participated. In the actual election, all 4000 of these people voted and those people who …
  9. maths

    a survey of 250 people showed that 220people favored a candidate for re-election what percent of the people surveyed favoured the candidate
  10. History

    1.)Which best describes the purpose of the Electoral College in the United States?

More Similar Questions