ory is based on a sample of 80 purchases, then should we conclude that this type of phone was getting less than half of the market at that time? ge a sample is needed for the 95% confidence interval for the population proportion to exclude 50%? onfidence interval for the parameter of interest is (OD). wo decimal places as needed.) conclude that this type of phone was getting less than half of the market at that time? e entire confidence interval is greater than 0.5, so we can conclude that this type of phone was getting more than half of the market. e confidence interval contains 0.5, so we can conclude that this type of phone was getting less than half of the market. e entire confidence interval is less than 0.5, so we can conclude that this type of phone was getting less than half of the market. e confidence interval contains 0.5, so we are unable to conclude that this type of phone was getting less than half of the market. ge a sample is needed for the 95% confidence interval for the population proportion to exclude 50%?

ory is based on a sample of 80 purchases, then should we conclude that this type of phone was getting less than half of the market at that time? ge a sample is needed for the 95% confidence interval for the population proportion to exclude 50%? onfidence interval for the parameter of interest is (OD). wo decimal places as needed.) conclude that this type of phone was getting less than half of the market at that time? e entire confidence interval is greater than 0.5, so we can conclude that this type of phone was getting more than half of the market. e confidence interval contains 0.5, so we can conclude that this type of phone was getting less than half of the market. e entire confidence interval is less than 0.5, so we can conclude that this type of phone was getting less than half of the market. e confidence interval contains 0.5, so we are unable to conclude that this type of phone was getting less than half of the market. ge a sample is needed for the 95% confidence interval for the population proportion to exclude 50%?

Name: A newspaper reported that 45% of smartphone purchases made by people
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: A newspaper reported that 45% of smartphone purchases made by people with incomes between $35,000 to $50,000 were a certain kind of phone.(a) If the story is based on a sample of 80 purchases, then should we conclude that this type of phone was gett

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Alfredo wants a 85% confidence interval for the true average gas mileage for a Gremlin after randomly sampling 9 Gremlins. It is known that the true sigma for Gremlin gas mileage is 4 mpg, and the average of the 9 Gremlins in Alfredo's study was 24 mpg. Find the confidence interval assuming the distribution is normal.
The Woodcock-Johnson Cognitive Ability test indicates that the average score is 95. The same group of 12th grade students (n = 72) in Columbus are tested and the sample mean is 110.1 and the sample standard deviation is 15.2. Do the scores provide good evidence that the mean IQ of this population is greater than 95? State the null (H0) and alternative (Ha) hypotheses. What are the confidence intervals for this data? What is the value of the test statistic? What is the p-value for this data? What is your decision about the null hypothesis? summerize the conclusion in the context
Consider the simple random sample of vehicle speeds below. Use the data to construct 3 different confidence intervals. We'll keep the sample size constant and vary the level of confidence, amd note the pattern that appears. Round results to 1 decimal place. * = 63 mph s = 10 mph n = 50 1. Construct the 80% confidence interval for vehicle speeds. 2. Construct the 90% confidence interval for vehicle speeds. 3. Construct the 99% confidence interval for vehicle speeds In 1- 2 complete sentences describe the effect increasing the level of confidence on the confidence interval.
Prof. Gersch knows that the score on a standardized test is perfectly normal with unknown mean and a standard deviation of 50. He then takes a random sample of 25 tests and finds that the average of these is 200. How many exams should he sample so that the maximum margin of errorfor his 95% confidence interval is 10?: a. 98 b. 97 c. 100 d. 96 e. 10
In order to estimate the percentage of adults who file their taxes at least two weeks be deadline, a 99% confidence interval is constructed. The interval ends up being from 0.756 to 0.864. Which of the following could be a 90% confidence interval for the same sample data? I. 0.749 to 0.871 II. 0.776 to 0.844 III. 0.765 to 0.875 IV. 0.799 to 0.841 OI only OIV only None of the answer options are reasonable 90% confidence intervals. III only O II only
Suppose a new treatment for a certain disease is given to a sample of 180 patients. The treatment was successful for 153of the patients. Assume that these patients are representative of the population of individuals who have this disease. Calculate a 98% confidence interval for the proportion successfully treated. (Round the answers to three decimal places.)
Inst O Question 11 We wish to estimate what percent of adult residents in a certain county are parents. Out of 400 adult residents sampled, 328 had kids. Based on this, construct a 90% confidence interval for the proportion 7 of adult residents who are parents in this county. HP As Give your answers as decimals, to three places. ch
Can anyone get this right. I've tried multiple answers, but none of them are correct. One picture has the info needed and thr other one contains the actual question for the confidence level. The answer is NOT WHAT'S PICTURED OR 2.547, 6.547
Solve Question 2 Please show work
We wish to estimate what percentage of adult residents in a certain county are parents. Out of 100 adult residents sampled, 84 had kids. Based on this, construct a 90% confidence interval for the proportion (p) of adult residents who are parents in this county. Give your answers as decimals, to three places. < p <
I need A and B
Eyeglassomatic manufactures eyeglasses for different retailers. They test to see how many defective lenses they make. Looking at the type of defects, they found in a three-month time period that out of 34,714 defective lenses, 5809 were due to scratches. Find a 90% confidence interval for the proportion of defects that are from scratches. Round to three decimal places. With from scratches is between confidence, we can conclude that the true proportion of defects that are and