Problem regarding the confidence interval change

Reference no: EM131008801

As in Exercise 5, from a survey of coworkers you find that 48% of 200 have already received this year's fluvaccine. An approximate 95% confidence interval is (0.409, 0.551).

a) How would the confidence interval change if the sample size had been 800 instead of 200?

b) How would the confidence interval change if the confidence level had been 90% instead of 95%?

c) How would the confidence interval change if the confidence level had been 99% instead of 95%?

Reference no: EM131008801

Questions Cloud

Estimate the percentage of businesses : In preparing a report on the economy, we need to estimate the percentage of businesses that plan to hire addi- tional employees in the next 60 days.

Critically evaluate the current policy for the issue : Discuss a significant issue / challenge arising from globalization that has taken place in the last three to six (3-6) months. Critically evaluate the current policy(ies) for the issue / challenge

Estimate the proportion of traditional college students : As in Exercise 9, you want to estimate the proportion of traditional college students on your campus who own their own car. However, from some research on other college campuses, you believe the proportion will be near 20%.

Estimate the proportion of traditional college : Suppose you want to estimate the proportion of traditional college students on your campus who own their own car. You have no preconceived idea of what that proportion might be.

Problem regarding the confidence interval change : a) How would the confidence interval change if the sample size had been 800 instead of 200? b) How would the confidence interval change if the confidence level had been 90% instead of 95%?

Coworkers fall in the interval : From a survey of coworkers you find that 48% of 200 have already received this year's flu vaccine. An approximate 95% confidence interval is (0.409, 0.551). Which of the following are true? If not, explain briefly. a) 95% of the coworkers fall ..

Standard error of the sample proportion : a) What is the value of the sample proportion p? b) What is the standard error of the sample proportion?

Identify all candidate keys for each relation : Create a Relation Schema for S given above. Write out both the full and the abbreviated schemas as shown on Slide of the lecture notes in Module 3. Using a table as a physical representation, create a relation for S as defined above. The table sho..

Standard weight of precious metal : The trial of the pyx. In 1150, it was recognized in England that coins should have a standard weight of precious metal as the basis for their value. A guinea, for example, was supposed to contain 128 grains of gold. (There are equivalent to the su..

User Account

All Pages