Question

Suppose in a survey of 900 randomly selected student, 432 said they favored chocolate ice cream....

Suppose in a survey of 900 randomly selected student, 432 said they favored chocolate ice cream.

A. Find a 90% confidence interval for the proportion of students who favor chocolate ice cream.

B. What sample size is needed if we want 90% confidence with a margin of error of 1%?

SHOW ALL WORK!

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

​​​​​​

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
In a survey, 25 students are asked if they like vanilla ice cream or chocolate ice...
In a survey, 25 students are asked if they like vanilla ice cream or chocolate ice cream. 14 students like vanilla flavor, 17 students like chocolate flavor, and 8 answer like both. (a) [1] What is the probability that a randomly selected student likes vanilla or chocolate flavor? (b) [1] What is the probability that a randomly selected student likes neither vanilla nor chocolate flavor? (c) [2] A student who likes chocolate ice cream is chosen at random, find the...
Out of a sample of 200 students, 75 indicated that they preferred chocolate ice cream to...
Out of a sample of 200 students, 75 indicated that they preferred chocolate ice cream to vanilla ice cream. a. Estimate the value of the population proportion of those who preferred chocolate ice cream. (Round the final answer to 3 decimal places.)       Estimated population proportion        b. Compute the standard error of the proportion. (Round the final answer to 4 decimal places.)   Standard error of the proportion    c. Determine a 90% confidence interval for the population proportion...
Out of a sample of 180 students, 85 indicated that they preferred chocolate ice cream to...
Out of a sample of 180 students, 85 indicated that they preferred chocolate ice cream to vanilla ice cream. a. Estimate the value of the population proportion of those who preferred chocolate ice cream. (Round the final answer to 3 decimal places.) Estimated population proportion    b. Compute the standard error of the proportion. (Round the final answer to 4 decimal places.) Standard error of the proportion    c. Determine a 80% confidence interval for the population proportion of those...
In a poll of 150 randomly selected U.S. adults, 79 said they favored a new proposition....
In a poll of 150 randomly selected U.S. adults, 79 said they favored a new proposition. Based on this poll, compute a 90% confidence interval for the proportion of all U.S. adults in favor of the proposition (at the time of the poll). Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to two decimal places. What is the lower limit of the 90% confidence interval? What is the upper limit...
A simple random sample (completely unbiased) of 1000 people indicated 90% preferred chocolate ice cream over...
A simple random sample (completely unbiased) of 1000 people indicated 90% preferred chocolate ice cream over vanilla ice cream. Calculate a 98% confidence interval for the proportion of people all around the world who prefer chocolate ice cream over vanilla ice cream. Interpret your result.
A research agency conducted a survey on randomly selected 2000 Malaysian adults aged 18 and over...
A research agency conducted a survey on randomly selected 2000 Malaysian adults aged 18 and over regarding weight issue. These adults were asked if they want to lose weight and 63% said yes. i) Construct a 97% confidence interval for the corresponding population proportion. ii) Find the minimum sample size if the research agency wants to be sure that the margin of error is within 0.04 of the population proportion for a 97% confidence interval. The preliminary estimate for the...
A researcher wishes to? estimate, with 90?% ?confidence, the population proportion of adults who say chocolate...
A researcher wishes to? estimate, with 90?% ?confidence, the population proportion of adults who say chocolate is their favorite ice cream flavor. Her estimate must be accurate within 5?% of the population proportion. ?(a) No preliminary estimate is available. Find the minimum sample size needed. ?(b) Find the minimum sample size? needed, using a prior study that found that 36?% of the respondents said their favorite flavor of ice cream is chocolate. ?(c) Compare the results from parts? (a) and?...
Of 400 randomly selected medical students, 21 said that they planned to work in a rural...
Of 400 randomly selected medical students, 21 said that they planned to work in a rural community. Find a 95% confidence interval for the true proportion of all medical students who plan to work in a rural community
Of 254 randomly selected medical students, 25 said that they planned to work in a rural...
Of 254 randomly selected medical students, 25 said that they planned to work in a rural community. Find a 95% confidence interval for the true proportion of all medical students who plan to work in a rural community.
A survey of 200 students is selected randomly on a large university campus They are asked...
A survey of 200 students is selected randomly on a large university campus They are asked if they use a laptop in class to take notes. The result of the survey is that 70 of the 200 students use laptops to take notes in class. What is the value of the sample proportion? What is the standard error of the sampling proportion? Construct an approximate 95% confidence interval for the true proportion by going 2 standard errors from the sampling...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT