Question

Suppose that a market research firm is hired to estimate the percent of adults living in...

Suppose that a market research firm is hired to estimate the percent of adults living in a large city who have cell phones. 500 randomly selected adult residents in this city are surveyed, 481 responded yes, they own cell phones. Find a 92% confidence interval for the true proportion of adults residents in this city who have a cell phone. Then give a complete confidence statement. Round only the last calculation (both endpoints of the interval) to two decimal places.

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
suppose that a market research firm is hired to estimate the percent of adults living in...
suppose that a market research firm is hired to estimate the percent of adults living in a large city who have cell phones. Five hundred randomly selected adukt residents in this city are surveyed ti determine whether they have cell phones. Of the 500 hundred people sampled, 421 responded yes- they own cell phones. using a 95% confidence level, compute a confidence interval estimate for the true proportion of adult residents of this city who have cell phones.
A researcher wishes to estimate the proportion of all adults who own a cell phone. He...
A researcher wishes to estimate the proportion of all adults who own a cell phone. He takes a random sample of 2000 adults; 1650 of them own a cell phone. The population of interest to the research is: A. the total 2000 adults surveyed B. The 1650 adults who own a cell phone C. All adults D. All adults who own a cell phone
In the 2009 Parent-Ten Cell Phone Survey conducted by Princeton Survey Research Associates International, 800 randomly...
In the 2009 Parent-Ten Cell Phone Survey conducted by Princeton Survey Research Associates International, 800 randomly sampled 16-17 year olds living I the U.S. were asked whether they have ever used their cell phone to text while driving. Of the 800 teenagers surveyed, 272 indicated that they text while driving. Obtain a point estimator and a 95% confidence interval of the proportion of 16-17 year olds who text while driving.
A Pew Internet poll asked cell phone owners about how they used their cell phones. One...
A Pew Internet poll asked cell phone owners about how they used their cell phones. One question asked whether or not during the past 30 days they had used their phone while in a store to call a friend or family member for advice about a purchase they were considering. The poll surveyed 1003 adults living in the United States by telephone. Of these, 462 responded that they had used their cell phone while in a store within the last...
Suppose as a part of a national study of economic competitiveness a marketing research firm randomly...
Suppose as a part of a national study of economic competitiveness a marketing research firm randomly sampled 160 adults between the ages of 27 and 35 living in City A and 210 adults between the ages of 27 and 35 living in City B. Each adult selected in the sample was​ asked, among other​ things, whether they had a college degree. From the City A sample 50 adults answered yes and from the City B sample 103 adults answered yes...
The National Restaurant Association reports that 40% of adults living in the U.S. prefer nutritious food...
The National Restaurant Association reports that 40% of adults living in the U.S. prefer nutritious food over non-nutritious food when eating out at restaurants (even if the non- nutritious food tastes better.) Joyce owns a restaurant in Iowa City. To plan her restaurant’s menu, she’s curious to know whether or not the national 40% figure holds true for Iowa City residents also. So she randomly surveys Iowa City adults with the question: Do you prefer nutritious food over non-nutritious food...
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...
12. A poll of 2,108 randomly chosen adults showed 93% of them own cell phones. The...
12. A poll of 2,108 randomly chosen adults showed 93% of them own cell phones. The claim was 91% of all adults own a cell phone. a. Based on the results above, state your decision and show how you arrived at it. (4 points) b. State your conclusion. (3 points) c. Write a confidence statement that correctly interprets the confidence interval. (3 points) d. In terms of your data, discuss the type of error you could have made and why....
A sociologist wants to construct a 96% confidence interval for the proportion of children aged 5...
A sociologist wants to construct a 96% confidence interval for the proportion of children aged 5 – 11 living in New York who own cell phones. a) A survey by Mediamark Research and Intelligence estimated the nationwide proportion to be 0.20. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.02? b) Estimate the sample size needed if no estimate of the nationwide proportion is given.
A food-research and consulting firm reported in 2013 that 54% of Americans prefer hot or spicy...
A food-research and consulting firm reported in 2013 that 54% of Americans prefer hot or spicy foods and sauces. Suppose that a condiment company is considering expansion of its dipping sauce product line with a new spicy flavor. The company requested its marketing research vendor to conduct a large-scale study to test whether consumer taste preference for spicy flavoring has increased since 2013. The marketing research vendor surveyed 2550 randomly selected adult Americans from its national consumer panel and found...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT