Question

In: Statistics and Probability

19. Claim: The percentage of people aged 18-30 that will vote for Candidate A is less...

19. Claim: The percentage of people aged 18-30 that will vote for Candidate A is less than the percentage of people aged 50-70 that will vote for Candidate A. Test at α = 0.05

Data: 150 random 18-30 year old people are asked, and 100 of them say they will vote for Candidate A. 200 random 50-70 year old people are asked, and 150 say they will vote for Candidate A.

(a) Are these data statistically significant evidence to support the claim?

(b) Are these data statistically significant evidence to refute the claim?

Solutions

Expert Solution

Let denotes the proportion of people aged 18-30 that will vote for Candidate A and denotes the proportion  of people aged 50-70 that will vote for Candidate A.

a) Yes, these data are statistically significant evidence to support the claim.

b) No, these data are not statistically significant evidence to refute the claim

orchestra answered 2 years ago
Next > < Previous

Related Solutions

3. In 2000, a sample of 209 people aged 18-30 found that they spent an average...
3. In 2000, a sample of 209 people aged 18-30 found that they spent an average of 6.75 hrs/week on the internet. In 2006, a sample of 541 people aged 18-30 spent an average of 7.34 hrs/week on the internet. Has the average increased? Use correct notation where appropriate. For each of the following situations, a) What is/are the population(s) in the study? b) Does the scenario involve 1 or 2 parameters to be estimated/tested/compared? c) What is/are the parameter(s)...
1. The General Social Survey polled a sample of 209 people aged 18-30 in the year...
1. The General Social Survey polled a sample of 209 people aged 18-30 in the year 2000, asking them how many hours per week they spend on the internet. The sample mean was 6.75 with a standard deviation of 7.71. A second sample of 541 people aged 18-30 was taken in 2006. For this sample, the mean was 7.34 and standard deviation of 10.93. Assume these are simple random samples from populations of people aged 18-30. Can you conclude that...
The General Social Survey polled a sample of 209 people aged 18-30 in the year 2000,...
The General Social Survey polled a sample of 209 people aged 18-30 in the year 2000, asking them how many hours per week they spend on the internet. The sample mean was 6.75 with a standard deviation of 7.7 A second sample of 541 people aged 18-30 was taken in 2006. For this sample, the mean was 7.34 and standard deviation of 10.93. Assume these are simple random samples from populations of people aged 18-30. Can you conclude that the...
A political candidate has asked you to conduct a poll to determine what percentage of people...
A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 5% margin of error at a 95% confidence level, what size of sample is needed?
A political candidate has asked you to conduct a poll to determine what percentage of people...
A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 4% margin of error at a 90% confidence level, what sample size is needed?
A political candidate has asked you to conduct a poll to determine what percentage of people...
A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 7% margin of error at a 90% confidence level, what size of sample is needed? ____
A political candidate has asked you to conduct a poll to determine what percentage of people...
A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 1% margin of error at a 99% confidence level, what size of sample is needed? Give your answer in whole people.
A political candidate has asked you to conduct a poll to determine what percentage of people...
A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 4% margin of error at a 95% confidence level, what size of the sample is needed? The political candidate will need to sample people. You measure 39 textbooks' weights, and find they have a mean weight of 44 ounces. Assume the population standard deviation is 12.7 ounces. Based on this, construct a 99% confidence interval for...
Out of 100 people sampled, 18 preferred Candidate A. Based on this, estimate what proportion of...
Out of 100 people sampled, 18 preferred Candidate A. Based on this, estimate what proportion of the voting population ( π π ) prefers Candidate A. Use a 90% confidence level, and give your answers as decimals, to three places. < π π
According to the National Institute on Alcohol Abuse and Alcoholism, 19% of college students aged 18...
According to the National Institute on Alcohol Abuse and Alcoholism, 19% of college students aged 18 to 24 abuse alcohol.1 Describe the population proportion of interest in words. What value are we assuming for this proportion? What is the sampling distribution for the sample proportion of college students aged 18 to 24 that abuse alcohol from a random sample of size 100 from this population? Make sure to explain why the appropriate conditions are met or not met as part...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT