Volunteering: The General Social Survey asked 1302 people whether they performed any volunteer work during the past year. A total of 525 people said they did. (a) Find a point estimate for the proportion of people who performed volunteer work during the past year. Round the answer to at least three decimal places. The point estimate for the proportion of people who performed volunteer work during the past year is 0.403. (b) Construct a 99.9% confidence interval for the proportion of people who performed volunteer work during the past year. Round the answer to at least three decimal places. A 99.9% confidence interval for the proportion of people who performed volunteer work during the past year is < p < .
Added by Nathaniel B.
Close
Step 1
The point estimate is the sample proportion, which is calculated as the number of people who volunteered divided by the total number of people surveyed. Point estimate = (number of people who volunteered) / (total number of people surveyed) Point estimate = 525 Show more…
Show all steps
Your feedback will help us improve your experience
Sri K and 81 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Volunteering: The General Social Survey asked 1295 people whether they performed any volunteer work during the past year. A total of 532 people said they did. (a) Find a point estimate for the population proportion of people who performed volunteer work in the past year. Round the answer to at least three decimal places. The point estimate for the proportion of people who performed volunteer work in the past year is (b) Construct an 80% confidence interval for the proportion of people who performed volunteer work in the past year. Round the answers to at least three decimal places. An 80% confidence interval for the proportion of people who performed volunteer work in the past year is < p < (c) A sociologist states that 46% of Americans perform volunteer work in a given year. Does the confidence interval contradict this statement? Explain. The confidence interval (Choose one) contradict the claim, because 0.46 (Choose one) contained in the confidence interval.
Adi S.
The table below shows the results of a survey that asked 2878 people whether they are involved in any type of charity work. Each person is selected at random from the sample. Complete parts (a) through (e): Frequently Male 223 Female 206 Total 429 Occasionally 456 450 906 Not at all 794 749 1543 Total 1473 1405 2878 Find the probability that the person is frequently or occasionally involved in charity work. P(being frequently involved or being occasionally involved) = ? (Round to the nearest thousandth as needed)
Volunteering the general social Survey asked 1294 people whether they performed any volunteer work during the past year A total of 517people did A find a point estimate for the proportion of people who performed volunteer work during the past year B Construct a 95% confidence interval for the proportion of people who performed volunteer work during the past year c A sociologist states that 50% of American volunteer work in a given year Dose the confidence interval contradict this statement Explain
Jason H.
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD