Use the confidence level and sample data to find a confidence interval for estimating the population μ. Round your answer to the same number of decimal places as the sample mean. A group of 20 randomly selected students have a mean score of 22.4 with a standard deviation of 2.8 on a placement test. What is the 90% confidence interval for the mean score, μ, of all students taking the test? (The data is normally distributed.) Group of answer choices 21.3 < μ < 23.5 21.6 < μ < 23.2 21.4 < μ < 23.4 21.5 < μ < 23.3

Use the confidence level and sample data to find a confidence interval for estimating the population μ. Round your answer to the same number of decimal places as the sample mean. A group of 20 randomly selected students have a mean score of 22.4 with a standard deviation of 2.8 on a placement test. What is the 90% confidence interval for the mean score, μ, of all students taking the test? (The data is normally distributed.) Group of answer choices 21.3 < μ < 23.5 21.6 < μ < 23.2 21.4 < μ < 23.4 21.5 < μ < 23.3

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 8PPS

See similar textbooks

Related questions

Q: You are given the sample mean and the population standard deviation. Use this information to…

Q: A group takes a Personality test of Extraversion and they all take the test. They find that the…

A: It is given that the mean and standard deviation are 50 and 10, respectively.

Q: The number of assists per match for the setter on IVC's volleyball team has a mean of 51 and a…

A: Given information- Population Mean µ = 51 Standard deviation (σ) = 13 We have to find the number of…

Q: You are given the sample mean and the population standard deviation. Use this information to…

Q: Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard…

A: We have given that X~N( 0 , 1 ) mu=0 , sigma =1 Z-score =(x-mu)/sigma

Q: 61 students are asked in a survey how many hours they work during a week. Their responses have a…

A: The random variable X follows normal distribution. The sample size is 61. The sample mean is 24. The…

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

Q: Use the given confidence interval to find the margin of error and the sample mean. (4.65,7.79)…

Q: Use the confidence interval to find the margin of error and the sample mean. (0.056,0.180)…

A: Given confidence interval (0.056,0.180) calculate Margin of error and sample mean

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A: To solve this problem, we need to find the 17th percentile (P17) of a normally distributed dataset…

Q: Hospital Noise Levels Noise levels at various area urban hospitals were measured in decibels. The…

A: Given that, Hospital noise levels at various area urban hospitals were measured in decibels. Let…

Q: eometric mean under A measure of lactation B measure of central tendency C Non

A: The geometric mean is defined as the average of a set of products. The geometric mean is a measure…

Q: You are given the sample mean and the population standard deviation. Use this information to…

A: The data on the price of the home theatre system is provided.Sample size, Sample mean, Population…

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: Given information Mean = 100 Standard deviation = 15 P(X > x) = 0.65 P(X < x) = 1 – 0.65 =…

Q: Use the confidence interval to find the margin of error and the sample mean. (0.278,0.400) The…

A: We have given the confidence interval(0.278, 0.400)Lower limit = 0.278Upper limit = 0.400

Q: 1. Мean, 2 Median, 3. Mode, 4. According to the sample test results, which company produces 1/8-inch…

A: Note : Since you have posted a question with multiple sub-parts, we will solve first three subparts…

Q: At a tennis tournament a statistician keeps track of every serve. The statistician reported that…

A: GivenMean(μ)=100standard deviation(σ)=9

Q: You are given the sample mean and the population standard deviation. Use this information to…

Q: For a distribution, bowley's coefficient of skewness is -0.53 Q₁ 16.7 and median = 24.3 what is the…

Q: You are given the sample mean and the population standard deviation. Use this information to…

Q: Assignment Carlos wants to replicate a study where the highest lowest observed value is 13.8 while…

A: given data

Q: You are given the sample mean and the population standard deviation. Use this Info and 95%…

A: sample size, n = 35 mean, x¯ = 131.00 std. dev., σ = 15.50

Q: Find the margin of error for each data from certain populations. 3. 45, 56, 61, 88, 91, 64, 38, 79,…

A: Given data: Confidence leval = 90% To find margin of error

Q: The table shows the sales revenue from the past 8 quarters. What is the 4-period moving average…

A: The given table shows the sales revenue from the past 8 quarters.

Q: dying the number of gallons of gasoline purchased per customer at self-service pumps. The mean…

Q: Find z for a 90% confidence level. Round your answer to two decimal places.

A: Given confidence level is 90% Significance level is 10%

Q: To estimate the mean hourly rate of lawyers in Ramallah we took a sample of 70 lawyers. This sample…

A: Confidence interval: It is defined as the range which contains the value of true population…

Q: Listed in the data table are IQ scores for a random sample of subjects with médium lead levels in…

A: The IQ scores are Medium lead level High lead level 72 n2=11 x2=91.088 s2=10.092 97 92…

Q: Out of 500 people sampled, 330 had kids. Based on this, construct a 99% confidence interval for the…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: You are given the sample mean and the population standard deviation. Use this information to…

Q: 3; 8; -1; 1; 0; 4; -3; 2; -1; 5; 4; -2 what is the standard deviation for this sample?

A: Given, The 12 change scores are 3,8,-1,1,0,4,-3,2,-1,5,4,-2

Q: You are given the sample mean and the population standard deviation. Use this information to…

Q: A poll of 2612 U.S. adults found that 15% regularly used Facebook as a news source. Find the margin…

A: The margin of error is defined as MOEγ=zγ×σn,γ is the confidence level,σ is the sample standard…

Q: A commuter tallied the time to work for 200 days and found resembled a normal curve. The mean time…

Q: Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard…

A: Given X~ N(0,1^2) Find P(X>a)= ?

Q: Use the confidence interval to find the margin of error and the sample mean. (0.456,0.620)

A: The confidence interval is given by (0.456, 0.620) Let M denote the sample mean, And E denote the…

Q: You are given the sample mean and the population standard deviation. Use this information to…

Q: The mean GPA for 50 students was 3.02 and the standard deviation was 0.3. Assume that the…

A: The mean GPA for 50 students was 3.02 and the standard deviation was 0.3. Also, the distribution of…

Q: You are given the sample mean and the po and 95% confidence intervals for the population mean.…

A: Sample size n =35 Sample mean=131 Population standard deviation =15.50

Q: Determine whether the statement below makes sense or does not make sense. Explain clearly. Based on…

A: Confidence interval is a method of estimations.

Q: You are given the sample mean and the population standard deviation. Use this information to…

A: The provided information are: Sample size(n)=40Sample mean(x¯)=1190Population standard deviation…

Q: Find the confidence interval for a proportion. Use the given data to construct a confidence…

Q: You are given the sample mean and the population standard deviation. Use this information to…

Question

Use the confidence level and sample data to find a confidence interval for estimating the population μ. Round your answer to the same number of decimal places as the sample mean.

A group of 20 randomly selected students have a mean score of 22.4 with a standard deviation of 2.8 on a placement test.

What is the 90% confidence interval for the mean score, μ, of all students taking the test? (The data is normally distributed.)

Group of answer choices

21.3 < μ < 23.5

21.6 < μ < 23.2

21.4 < μ < 23.4

21.5 < μ < 23.3

Definition Definition Method in statistics by which an observation’s uncertainty can be quantified. The main use of interval estimating is for describing a range that is made by transforming a point estimate by determining the range of values, or interval within which the population parameter is likely to fall. This range helps in measuring its precision.

Expert Solution