You want 90 confidence that your estimated proportion is, Ask an Expert

Statistics

You are hired to conduct a poll to determine how many people are satisfied with their phone service. You want 90% confidence that your estimated proportion is within 2.5 percentage points of the true proportion. A previous poll suggests that the proportion is 85%. How large must your sample be?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9118975

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

The national safety council reported that 52 of american

The National safety council reported that 52% of American turnpike drivers are men. A sample of 300 cars traveling southbound on the New Jersey Turnpike yesterday revealed that 170 were driven by men. At a 99% level of c ...

A stat 200 instructor wants to know if students tend to

A STAT 200 instructor wants to know if students tend to score differently on the lesson 4 and 5 quizzes. Data were collected from a representative sample of 60 students during the Summer 2018 semester. Data were paired b ...

Fifty-seven percent of employees make judgements about

Fifty-seven percent of employees make judgements about their co-workers based on the cleanliness of their desk. You randomly select 8 employees and ask them if they judge co-workers based on this criterion. The random va ...

A banks loan officer rates applicants for credit the

A banks loan officer rates applicants for credit. The ratings are normally distributed with a mean of 200 and a standard deviation of 50. If an applicant is randomly selected, find the probability of a rating that is bet ...

If you flip five coins what is the probability that you

If you flip five coins what is the probability that you will get at least three heads?

Over the past 100 years the level of government regulation

Over the past 100 years, the level of government regulation of financial institutions and markets has ebbed and flowed or, as some economists might argue, has ebbed and flooded. Although the laws and regulatory agencies ...

Your client wants to save 500000 for his retirement he

Your client wants to save $500,000 for his retirement. He plans to retire in 20 years. How much must he deposit in his individual retirement account now, assuming that the account pays a fixed rate of 8% annually, to mak ...

On the production line the company finds that 956 of

On the production line the company finds that 95.6% of products are made correctly. You are responsible for quality control and take batches of 30 products from the line and test them. What number of the 30 being incorre ...

Xyz company to have earnings of 320 per share during the

XYZ company to have earnings of $3.20 per share during the fiscal year ending in one year on September 21, 2019. The firm currently plans to retain 90 percent of earnings at the end of each of the next three fiscal years ...

If you know your raw score is 35 your z score is -3 and

If you know your raw score is 35, your z score is -3, and your t score is 20. The mean is 50 and the standard deviation is 5. How would you use this information to solve for a percentile rank?

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert