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Suppose that in elections, a candidate says that he'll get 60% of the votes in the election. The total population is 300 persons and the whole campaign team (20 persons) is going to vote for him. To verify his claim the campaign team decided that their going to take a randomized sample of 25 persons and in this sample 20 persons will vote for the candidate.
a) With this results, is it possible to prove the claim of the candidate?
b) The candidate wants more guarantees, this is due to the fact that the sample is identical to the number of people in his campapign team, what would you say to the candidate so he could trust in the results? Back your claims with quantitative information.
c) If the number of people that voted for the candidate in the sample is 0, do you think that this could be used as a proof to contradict the candidate's pronostic? Back your claims with quatitative information.
Calculate a 90% CI for the population proportion of Americans who believe there is intelligent life on other planets.
q1. describing data frequency distribution and graphic presentationsyou are the parts manager for a local dumb phone
I need to find the maximum and minimum surface areas for 2 cubes with a total volume of 432 in^3. No other perameters are specified. I've been able to use common sense to find the max is 432 sq/inches
Advertisers need to know which age groups are likely to see their ads. Purchasers of 120 copies of Cosmopolitan are shown by age group, (a) Make a bar chart and describe it. (b) Calculate expected frequencies for each class.
Mean waiting time was 15 minutes and that the standard deviation was 4 minutes. The 95% confidence interval for the population mean of waiting times is?
Find a dataset: approximately 30-100 scores or observations. Write a null and alternative hypothesis, conduct a statistical significance test (in SPSS or Excel), and tell what decision you'd make about the null hypothesis, and why.
q1.the weights of first graders at freemont elementary were recorded as follows. construct a frequency distribution
when testing h0u gt u0 using confidence intervals if u is not contained in the confidence interval then we would a.
Assume each lifetime is independent. Round your answer to four decimal places (e.g. 98.7654). What is the probability that the lathe will operate at least seven years?
The Pew Research Center’s Social & Demographic Trends project found that 46% of U.S. adults would rather live in a different type of community than the one where they are living now (Pew Research Center, January 29, 2009). The national survey of 2260..
gigi and ron are candidates for mayor in a city. you want to estimate the proportion of gigis voters with 90 confidence
Suppose the Doctor would be content with 95% confidence. How does the decrease in confidence affect the sample size required?
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