After a polution event in an estuary, we want to estimate proportion of shell fish thatare impacted by the pollution in the water. What sample size do we need to ensure our95% confidence interval is no more than +/-0.025 given no information on the likely levelof the proportion?

It is given that margin of error (E) is 0.01 and the confidence level is 95%.

Answered: After a polution event in an estuary,…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

4) Question: A sample of 40 patients shows that their average cholesterol level is 200 mg/dL with a standard deviation of 20 mg/dI.. Construct a 99% confidence interval for the population mean cholesterol level.
In a random sample of 50 male students the average height is 68.2 with standard deviation 2.5 . Obtain 99% confidence interval for the mean height of all students.
Suppose an insurance company randomly surveyed 633 drivers and found that 601 claimed they always buckled up. Construct a 94% confidence interval for the fraction of all drivers who buckle up. p' = NR dje = Margin of Error: E = We are 94% confident that the fraction of drivers who always buckle up is between and
Find the critical value x²R corresponding to a sample size of 19 and a confidence level of 99 percent. X²R = (Round to 3 decimals)
The length of a certain type of fish is normally distributed with mean and standard deviation sigma = 2.4 inches. The margin of error for a 99% confidence interval is desired to be 0.08 inches. What should be the sample size?
Find the critical ?* for a level 81.01 % confidence interval. z*=
Find the critical value zα/2 that corresponds to the confidence level 90%. QUESTION** zα/2 = ?
A researcher wants to estimate the difference between the mean score points of home and visitor teams in a basketball game. For this purpose, researcher randomly selects 24 basketball games and obtains their scores. In these games, home teams' mean score is 80 points with a standard deviation of 35 points while visitor teams' mean score is 79 points with a standard deviation of 10 points. Assuming equal population variances, find the (93)% confidence interval for the difference between the mean score points of home and visitor teams.
The sales price of a special brand of cereal is believed to be normally distributed. Data were collected for a sample of 16 boxes of that brand of cereal and obtained a sample standard deviation of 0.8 OR. If the sample mean is 2 OMR then the 98% confidence interval for the population mean is
A car manufacture produces a new car that advertises an average of 30 MPG. The distribution of MPG of cars is normally distributed. The manufacturer will test 30 cars off the assembly line to find a confidence interval of the average MPG of their new vehicle to determine if it is close to 30. The average MPG of the 30 cars is 31.2 gallons with a standard deviation of 2 gallons. Find a 95% confidence interval for the average MPG of the new vehicle. (30.45, 31.95) (30.48, 31.92) O (31.18, 31.22) O The sample size is too small to compute a confidence interval.
A city planner wants to estimate the average monthly residential water usage in the city. He selected a random sample of 42 households from the city, which gave the mean water usage to be 3409.30 gallons over a one-month period. Based on earlier data, the population standard deviation of the monthly residential water usage in this city is 387.90 gallons. Make a 97% confidence interval for the average monthly residential water usage for all households in this city.

Recommended textbooks for you

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

SEE MORE TEXTBOOKS

After a polution event in an estuary, we want to estimate proportion of shell fish that are impacted by the pollution in the water. What sample size do we need to ensure our 95% confidence interval is no more than +/-0.025 given no information on the likely level of the proportion?