Suppose that a garage finds that 42 customers of 142 customers samples get their oil changes on time. Find a 98% confidence interval of the true proportion. What is the lower bound of the confidence interval? (round to 4 decimal places)

Suppose that a garage finds that 42 customers of 142 customers samples get their oil changes on time. Find a 98% confidence interval of the true proportion. What is the lower bound of the confidence interval? (round to 4 decimal places)

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: 7. (Sec. 7.2) In a survey of 2004 American adults, 501 of them said that they believed in astrology…

A: Introduction:The 100 (1 – α) % confidence interval for the population proportion, π is: (p – (zα/2)…

Q: 1. Determine the critical value (z*) you would use to create a 94% confidence interval.

Q: In a sample of 120 adults, 114 had children. Construct a 99% confidence interval for the true…

Q: Suppose we know that a confidence interval is (-.735, .125). Find the sample mean and the error…

A: Ans- Given, a confidence interval is (-.735, .125). Find the sample mean and the error bound.

Q: Determine the 80% confidence interval estimate for the population mean of a normal distribution…

A: given data n = 144x¯ = 1500σ = 11180% ci for μ = ?

Q: A group of 10 students from elementary school has their height measured. The sample mean is 119 cm…

Q: A random sample of 49 lunch customers was selected at a restaurant. The average amount of time the…

A: Given: n= 49.0 , x̄= 33.0 σ= 10.0 At 95.0 % confidence level , z score= 1.96

Q: A random sample of 300 high school students in a particular town showed that 165 smoke on a regular…

A: Given Information: Sample size (n) = 300 Proportion of students who smoke (p) = 165/300 = 0.55

Q: In a sample of 350 adults, 277 had children. Construct a 99% confidence interval for the true…

A: The sample size, i.e., the sampled number of adults, n=350.The sampled number of adults with…

Q: A study found that for a sample of cars traveling on Interstate 70, the average speed was 70 mph…

A: We have to find margin of error.

Q: A random survey of 70 male sophomores showed 16 preferred off campus living and out of 63 female…

Q: The mean hours of worked for United Airlines pilots is 46 hours/month based upon a sample of 25…

A: Given: Sample size, n=25 Sample mean, X=46 hours Sample standard deviation, s=3 hours The level of…

Q: Insurance companies are interested in knowing the population percent of drivers who always buckle up…

Q: In a sample of 270 adults, 151 had children. Construct a 90% confidence interval for the true…

A: Given that Sample size n =270 Favorable cases x =151 Sample proportion p^=x/n =151/270 =0.5593

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 200…

A: The objective of this question is to construct a 90% confidence interval for the proportion of adult…

Q: We randomly sample 300 people in a specific town. 96 of them like cats. Based on this, construct a…

A: The provided information are: Sample size=n=300 Number of favroable cases==x=96 to Construct the 95%…

Q: am interested if there is a difference in the mean amount that freshman and seniors spend on texts…

A: Given that random sample of 54 freshman and 52 seniors. Based on these samples a 95% confidence…

Q: random sample of 500 Jordanian firms, it was found that 420 Jordanian firms made a profit, The…

A: Given that Sample size (n) = 500 Films made profit (x) = 420 Sample proportion (p) = 420500=0.84…

Q: uppose a researcher collected data with n = 200 and came up with a sample mean of 83 and 95%…

A: Given n=200 Mean=83

Q: Chapter 08, Section 8.3, Problem 044 The mean time taken to design a house plan by 39 architects was…

A: It is given that the sample size is 39 architects, the mean time is 17 hours and standard deviation…

Q: If 32 students from the sample use Samsung smartphone and the accuracy level will be within + 3%.…

A: Given margin of error is 3%.

Q: All else equal, an increase in the level of confidence will cause a(n) increase decrease O O in the…

A: From the provided information,The statement is that if all else equal then an increase in the level…

Q: A report statesb that 33% of home owners had a vegetable garden. how large a sample is needed to…

A: p=33%=0.33, E=5%=0.05

Q: In a sample of 290 adults, 191 had children. Construct a 95% confidence interval for the true…

A: 0.604 < p < 0.713 Explanation:Approach to solving the question:To construct a 95% confidence…

Q: group of 10 students from elementary school has their height measured. The sample mean is 166 cm and…

Q: Out of a sample of 500 adults aged 18 to 30, 150 still lived with their parents. Based on this,…

A: We have given that, Sample size (N) = 500 Number of favorable cases (X) = 150 Then, We will find…

Q: people from Tanjung Malim has been given cholesterol tests, and 60 of these people had levels over…

A: We have given that, Favorable cases (X) = 60 and sample size (n) = 150 Then, We will find the 95%…

Q: In a sample of 270 adults, 173 had children. Construct a 99% confidence interval for the true…

A: The sample size n= 270. The sample proportion is 173/270. The absolute value of Zα/2 is 2.5758 using…

Q: In a city, out of 200 people sampled, 146 had kids. Based on this, construct population proportion…

Q: In a sample of 290 adults, 261 had children. Construct a 95% confidence interval for the true…

A: Given : Sample Size, n = 290 Number of successes, x = 261

Q: In a sample of 550 adults, 512 had children. Construct a 99% confidence interval for the true…

A: Given X=512 n=550

Q: In a random sample of 500 Americans, 50% indicated that they have a cat for a pet. Estimate with 95%…

A: Given information

Q: calculate t value if df is 24 and 95% confidence interval

A: Given Information: Degrees of freedom df=24 Confidence level = 95% = 0.95 Significance level…

Q: In a sample of 350 adults, 277 had children. Construct a 99% confidence interval for the true…

A: Sample size, Number of adults having children, Confidence level is .

Q: A survey conducted by Sallie Mae and Gallup of 1250 respondents found that 875 students paid for…

A: Solution: Given information: n= 1250 Sample size of respondentsx= 875 students paid for their…

Q: You collect a random sample of 50 webpage load times in milliseconds (ms) from the server logs. The…

A: Given, n = 50 x¯ = 210 s = 33.6

Q: Suppose that a 92% Confidence Interval for estimating the average heights, in inches, of all college…

A: we use the following, margin of error = Z a/2 * (standard error)where, Za/2 = Z-table…

Q: In a sample of 300 adults, 267 had children. Construct a 90% confidence interval for the true…

A: To construct a 90% confidence interval for the population proportion, we'll use the formula for the…

Q: A survey found that 611 out of 663 college graduates cannot correctly spell the word aluminum. Find…

A: Given that A survey found that 611 out of 663 college graduates cannot correctly spell the word…

Q: In a sample of 520 adults, 416 had children. Construct a 95% confidence interval for the true…

A: The sample size, i.e., the sample number of adults, n=520.The number of adults with children in the…

Question

Suppose that a garage finds that 42 customers of 142 customers samples get their oil changes on time. Find a 98% confidence interval of the true proportion.

What is the lower bound of the confidence interval? (round to 4 decimal places)

AI-Generated Solution

AI-generated content may present inaccurate or offensive content that does not represent bartleby’s views.

Unlock instant AI solutions

Tap the button
to generate a solution

Click the button to generate
a solution

SEE SOLUTION

Similar questions

A recent study by the McGraw-Hill company showed that 61% (1621) of college students use their smartphones for studying. The sample size for this poll was 2657 students. Create a 95% confidence interval for the true proportion of all college students who use their smartphones to study. Round to two decimal places.
Suppose that a garage samples 20 customers. They find the average time for there oil change is 4,227 miles and a standard deviation of 1,044. Find a 90% confidence interval of the true mean. What is the lower bound of the confidence interval? (round to the correct integer)
A random sample of 202 shoppers at bluewater were asked why they chose to stop at location. 93 indicated it was the variety if shops was key reason. Estimate a 90% confidence interval for the true proportion of shoppers who wen their for variety as a key reason and interpret the meaning of this interval. Use 3.dp
In a sample of 470 adults, 306 had children. Construct a 99% confidence interval for the true population proportion of adults with children.Give your answers as decimals, to three places < p <
Out of 300 people sampled, 135 received flu vaccinations this year. Based on this, construct a 95% confidence interval for the true population proportion of people who received flu vaccinations this year. Give your answers as decimals, to three places
In a sample of 460 adults, 281 had children. Construct a 90% confidence interval for the true population proportion of adults with children. Give your answers as decimals, to three places < p <
A random sample of 120 rhesus monkeys found that the number of rhesus monkeys that live in a captive breeding facility is 77. Construct a 90% confidence interval for the true proportion of rhesus monkeys that live in a captive breeding facility.
Sam computed a 95% confidence interval for mean from a specific random sample. His confidence interval was 10.1< mean< 12.2. He caims that the probability that mean is in this interval 0.95. What os wrong with his claim?
A random sample of 49 Europeans was asked how many days of vacation they take each year. The sample mean was 30 and the population standard deviation is known to be 4. What is the 99% confidence interval of the true population parameter describing average vacation days?
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.
Suppose the researcher decided to find 95% confidence interval for the mean working hours based on the collected sample.
Fifty-five students were randomly selected from Airbender College, and their average score on a meditation course is 68.22 with a standard deviation of 18.8. Construct a 99% confidence interval for the mean test scores for all students at Airbender College. Also find the margin of error. Round your answers to 3 decimal places.