You have collected data on 40 earthquakes. You have found that 8 of the 40 earthquakes are above a 3.0. Construct and interpret a 98% confidence interval for the proportion of earthquakes that are above a 3.0. Use R.
You have collected data on 40 earthquakes. You have found that 8 of the 40 earthquakes...
An interactive poll found that 364 of 2,332 adults aged 18 or older have at least one tattoo. (a) Obtain a point estimate for the proportion of adults who have at least one tattoo. (b) Construct a 90% confidence interval for the proportion of adults with at least one tattoo. (c) Construct a 98% confidence interval for the proportion of adults with at least one tattoo. (d) What is the effect of increasing the level of confidence on the width...
Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p. Round to three decimal palces Of 98 adults selected random from one town, 68 have health insurance Find a 90% confidence interval adults in he own who have heal e proportion on r e a ns rance 0585 < p < 0 802 B. 0.617<p<0.770 A. C. 0603 p<0.785 D. 0.574p<0.814 Use the given degree of confidence and sample data to...
The sample data below have been collected based on a simple random sample from a normally distributed population. Complete parts a and b 3 7 4 Compute a 98% confidence interval estimate for the population mean. The 98% confidence interval for the population mean is from 1 to (Round to two decimal places as needed. Use ascending order.)
8.1.7 Questi 1 4 The sample data below have been collected based on a simple random sample from a normally distributed population. Complete parts a and b. 0 2 9 3 9 4 3 1 a. Compute a 98% confidence interval estimate for the population mean The 98% confidence interval for the population mean is from to (Round to two decimal places as needed. Use ascending order.)
The First National Bank of Wilson has 660 checking account customers. A recent sample of 40 of these customers showed 36 have a Visa card with the bank. Construct the 98% confidence interval for the proportion of checking account customers who have a Visa card with the bank. (Use z Distribution Table.) (Round your answers to 3 decimal places.) The confidence interval for the proportion is between _______ and .________
Suppose data collected by observers at randomly selected intersections across the country revealed that in a sample of 100 drivers, 40 were using their cell phone. a. Give a point estimate of p. the true driver cell phone use rate (that is, the true proportion of drivers who are using their cell phone while driving). b. Compute a 95% confidence interval for p. c. Give a practical interpretation of the interval, part b. a. A point estimate for p is...
Suppose that a simple random sample of 121 people finds that 40 eat chocolate every day. Use this information to answer the following. A)What is the sample proportion for people who each chocolate every day? B)Do we have what we need to compute a confidence interval? Be sure to include your reasoning for full credit. C)Find the lower bound for a 98% confidence interval of the true proportion of people who eat chocolate daily, accurate to 3 decimal places. D)Find...
A 2007 Harris poll took a random sample of 1241 Americans and found that 493 of them believed that the profession of teaching "has very great prestige". Find and interpret a 98% confidence interval for the true proportion of Americans who believe that the teaching profession "has very great prestige. Find and interpret a 98% confidence interval for the true proportion of Americans who believe that the teaching profession "has very great prestige."
3.) Best predicted job performace rating, explain how you found the job performance rating. 4. Contruct a 98% confidence interval for the mean amount of juice in all such bottles. Use the given data to find the best predicted value of the response variable. Points: 5 3) The regression equation relating attitude rating (x) and job performance rating (y) for the employees of a company is y = 11.7 +1.02x. Ten pairs of data were used to obtain the equation....
Police set up an auto checkpoint at which drivers are stopped and their cars are inspected for safety problems. They find that 25 of the 250 vehicles stopped have at least one safety violation. a) Find a 98% confidence interval for the proportion of drivers in the county that have vehicles with at least one safety violation. Do not make these calculations by hand. Instead, use the 1-PropZInt command in your graphing calculator found under STAT – TESTS. Write out what you...