Answered: What is the 90% confidence interval?…

Math

Statistics

What is the 90% confidence interval? [smaller value, larger value] confid level 0.90 critical value z*=1.645

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

Related questions

Q: A doctor would like to estimate the mean difference in height of pairs of identical twins. The…

A: The correct inference regarding the given interval of (-0.823, 0.573) is to be made from the given…

Q: In a poll of 1000 randomly selected voters in a local election, 322 voters were against school bond…

A: Given: Sample size (n) = 1000 Let "x" be the voters who were against school bond measures. x = 322…

Q: Suppose a different police department says their SRS resulted in a 95% confidence interval of 10.1%…

Q: Suppose we wanted to construct a 90% confidence interval for a population mean based upon n = 17…

A: Given, Confidence interval =90% n =17

Q: You randomly select 20 cars of the same model that were sold at a car dealership and determine the…

A: Answer:- Given, Sample size, n = 20 Sample mean, X¯= 9.75 Sample standard deviation, S = 2.39…

Q: A poll reported that only 507 out of a total of 1809 adults in a particular region said they had a…

A: The sampled no. of adults, i.e., the sample size, n=1809. The no. of sampled adults who expressed a…

Q: Four different designs for a digital computer circuit are being studied in order to compare the…

A: Given Information:- As per guidelines we will only answer the first three subparts, please repost…

Q: Suppose a TA wanted to estimate the proportion of students who failed Stat 119 for the 980 students…

A: Obtain the point estimate for the true proportion of students who failed the course. The point…

Q: In a simple random sample of 38 bulbs, 25 gives a good glow, What is a 85% score Confidence interval…

A: Given data,n=38x=25sample proportion p=xn=2538=0.66z-value at 85% confidence is Zc=1.44

Q: A 90% confidence interval for the mean proportion of airline reservations being canceled on the day…

A: Solution: From the given information, a 90% confidence interval for the mean proportion of airline…

Q: suppose an individual was studying temperature's effect on crime rate. The researcher looked at 6…

A: Solution:The sample mean is obtained below:From the given information, number of observations is 6…

Q: A recent survey showed that among 850 randomly selected subjects who completed 4 years of college,…

A: I'm providing the solution below please do refer it and let me know if you have any queries…

Q: Find the 95% confidence interval for the difference in the two population means X1 = 12, s1 = 2.2,…

A: The sample mean of group 1 is The sample standard deviation of group 1 is The sample size of group 1…

Q: In a recent survey of 200 households, 172 had central air conditioning. Find the 85% confidence…

A: Given that In a recent survey of 200 households, 172 had central air conditioning That is…

Q: In a survey of 1005 adults 526 stated construct a 95% confidence interval

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A: This question requires more accurate results. Hence I will use excel to solve this question.…

Q: What is the z multiplier for a 70% confidence level? Round to the nearest 3rd decimal place, x.xXX

A: Confidence level=70%

Q: A survey of 45,535 adults showed that 20,901 were very concerned abut climate change. What is the…

Q: A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were…

Q: A survey of 80 recent fatal traffic accidents showed that 50 were alcohol-related. Find the 84%…

Q: A random sample of 75 college students of MSU is selected and 16 are found to have motorcycles on…

A: From the given information, The sample size is 75. Out of 75 students, 16 are found to have…

Q: A flu shot is administered during flu season. We look at the effect of the shot on individuals who…

A: Thank you for posting the question. As per the Bartleby guidelines, I have solved the first…

Q: In a plant box consisting of 120 seedlings, 80 seedlings were treated with growth enhancer. Compute…

A: Let X=80, n=120

Q: A random variance survey of 495 adults found that 59 had diabetes. which of the following is a 98%…

Q: A sample of 200 lightbulbs was tested and it was found that 11 were defective. Calculate a 95%…

Q: A survey of 100 customers showed that 36 of them preferred brand B of a particular product. Give a…

A: p = proportion of people vote for BSample size : n = 100Number of favorable outcomes : x =…

Q: A random sample of 300 graduating high school seniors was polled across a particular tristate area,…

Q: FIND Za, FOR THE 94% /2 CONFIDENCE INTERVAL

A: Step 1: Subtract the confidence level from 100% to find the α level: 100% – 94% = 6%. Step 2:…

Q: A sample of 3048 randomly chosen people found that 341 of them were left-handed. Construct a 99%…

A: Sample proportion=p^=xn=3413048Critical value for 99% confidence interval is=z=2.576n=sample…

Q: andom sample of 1200 high school freshmen was taken and it was found that 559 of them were reading…

A: The population proportion (p) will be proportion of high school freshman who reads at or above their…

Q: 82 adults selected randomly from one town, 66 have health insurance. Find a 90% confidence interval…

Q: A sociologist develops a test to measure attitudes about public transportation, and 20 randomly…

A: The confidence interval is a set of elements that have been imagined to comprise, with a specified…

Q: MCC was interested in the percentage of their students who are employed within one year of…

A: From the provided information, Sample size (n) = 200 Among which 162 were employed within one year…

Q: From a lake, an unknown proportion of fish have been tagged. You collect a sample of 100 fish taken…

Q: 90% confidence interval for the mean of airline reservations being canceled on the day of the flight…

A: Given 90% confidence interval is (2.68,9.42) Lower limit=2.68 Upper limit=9.42 Point estimate p=?

Q: Find the critical value zc that corresponds to an 80% confidence level.

A: Given : α=1-0.80=0.20We want to find,Critical value,Zc=?

Q: According to the Government Accountability Office (GAO), women comprise of about 17% of the active…

A: Solution: Let X be the number of women enlisted in the military and n be the sample number of…

Q: A study of 1907 traffic fatalities found that 725 were alcohol related. Suppose you want your 99%…

A: Given information Total number of traffic fatalities(n) = 1907 Number of fatalities, alcohol related…

Q: Out of a survey of 900 adults, 567 said that teenagers were more dangerous drivers than senior…

A: Givensample size(n)=900No.of adults said that teenagers were more dangerous divers(x)=567sample…

Question

In a poll of 1000 randomly selected voters in a local election, 145 voters were against fire department bond measures.

What is the 90% confidence interval?

[smaller value, larger value]

confid level

0.90

critical value

z*=1.645

Expert Solution

Step 1: Given Information:

It is given that

Favourable cases, x = 145

Sample size, n = 1000

Confidence level = 90%

Step by step

Solved in 3 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Similar questions

In a recent year, a sample of the South American Redeye Piranha was collected by fishermen on a particular river. Wildlife biologists regard this sample as a random sample of all Redeye Piranha in that river. The mean length of the 60 fish in the sample was 12.88 cm, and a 99% confidence level for the true mean length of all Redeye Piranha in that river is 12.09 cm to 13.67 cm. Explain what would happen to the length of the interval if the confidence level were decreased to 95%.
the variance in waiting times(in minutes) of 10 attendees at bethel woods, where attendees enter a single waiting line that feeds three checkpoint windows is 0.227 minutes. A 95% confidence interval for the population variance would be
In a random sample of 400 adults in a small town, 189 of them participated in some form of adult education. Find a 98% confidence interval for the population proportion of adults in the town who participate in adult education
In a Time/CNN survey, 24% of 205 single women said that they “definitely want to get married.” In the same survey, 27% of 260 men gave that same response. Construct a 99% confidence interval estimate of the difference between the proportion of single women and single men who definitely want to get married. 2. Is there a gender gap on this issue? How do you know?
A sample of 1200 females and 1000 males found that 78.3% of females and 35.1% males supported increased funding of arts. Construct a 90% confidence interval around the difference in proportions.
A random sample of high school seniors were asked whether they were applying for college. The resulting confidence interval for the proportion of students applying for college is (0.65,0.69). What is the margin of error?
Researchers are studying whether the proportion of homeschooled children in district 1 (considered 1) is less than the proportion of homeschooled children in neighboring district 2 (considered as 2). To test the theory info was gathered: district 1 had 600 students of which 90 were homeschooled. District 2 had 550 students of which 99 were homeschooled. What is the 95% confidence interval for the difference proportion between district 1 and 2? A. (-0.086, 0.026) B. (0.143, 0.217) C. (0.113, 0.187)
Of 130 adults selected randomly from one town, 25 of them smoke. Construct a 99% confidence interval for the true percentage of all adults in the town that smoke.
A 92% confidence interval for the mean number of cucumbers a plant produces per season was calculated with a sample size of 77 plants and was said to be between 16 cucumbers and 22 cucumbers (including 16 and 22). What is the margin of error?
A sample of 30 Microsoft employees yielded a mean of 44 hours worked per week with a standard deviation of 8 hours. What is the 95% confidence interval on the mean hours worked for Microsoft employees?