How large does my random sample size n require to be in, Ask an Expert

Statistics

A market research firm desires to conduct a survey to estimate average amount spent by visitors to in 20. History tells us the population standard deviation is $398.

a) How large does my random sample size (n) require to be in order to be at the 95% confidence interval?

b) How large does my random sample size (n) require to be in order to be at the 98% confidence interval?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M918589

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

A researcher wants to determine if lead levels are

A researcher wants to determine if lead levels are different between the top of a glass of water and the bottom of a glass of water. Many samples of water are taken. From half, the lead level at the top is measured and f ...

Strip mining inc can develop a new mine at an initial cost

Strip Mining Inc. can develop a new mine at an initial cost of $11 million. The mine will provide a cash flow of $39 million in 1 year. The land then must be reclaimed at a cost of $32 million in the second year. a. Wha ...

How can a graph or chart of data help you understand the

How can a graph or chart of data help you understand the results? What is a frequency table? Describe an example where a frequency table can be used in life.

1 a stat 200 instructor wants to know if students tend to

1. 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 paire ...

Anbspbbb-rated corporate bond has a yield to maturity of

A? BBB-rated corporate bond has a yield to maturity of 11.2%. A U.S. treasury security has a yield to maturity of 9.9%. These yields are quoted as APRs with semiannual compounding. Both bonds pay? semi-annual coupons at ...

The time between accidents in a day in town a is given by t

The time between accidents in a day in town A is given by T and the time between accidents in a day in town B is given by S. The joint density function for T and S is f ( t , s )= e^ -( t + s ) , for t ≥0 and ...

Loking for guidancea normal population has a mean of mu

Looking for guidance: A normal population has a mean of μ = 100. A sample of N = 36 is selected from the population, and a treatment is administered to the sample. After treatment, the sample mean is computed to be = 106 ...

Using a telephone survey of 400 randomly selected

Using a telephone survey of 400 randomly selected registered voters, he solicits both their party identification and whether or not they had read the newspaper that day. The results are displayed in the following cross-t ...

If i had to collect and assess the quality and

If I had to collect and assess the quality and appropriateness of data held by a large, multi-national organization. What steps should I take? How would I address network, security, and ethical considerations when decidi ...

In a sample of 28 cups of coffee at the local coffee shop

In a sample of 28 cups of coffee at the local coffee shop, the average temperature was 162.5 degrees with a standard deviation of 16.7 degrees. What would be the 95% confidence interval for the temperature of your cup of ...

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