Twelve different video games showing alcohol use were observed. The duration times of alcohol use were​ recorded, with the times​ (seconds) listed below. Assume that these sample data are used with a 0.05 significance level in a test of the claim that the population mean is greater than 80 sec. If we want to construct a confidence interval to be used for testing that​ claim, what confidence level should be used for a confidence​ interval? If the confidence interval is found to be 3.7 sec<μ<208.8 ​sec, what should we conclude about the​ claim?

Q: We have presented a confidence interval (CI) for the difference, μ1 − μ2, between two population…

A: The 90% confidence interval is from –10 to –5. The 90% confidence interval for the mean of the…

Q: Suppose the NCES would like to re-do their study. If they want a 95% confidence interval with a…

A:

Q: If n=32, ¯xx¯(x-bar)=31, and s=14, construct a confidence interval at a 95% confidence level. Assume…

A: Given: x¯=31n=32s=1495% confidence level

Q: If n = 100 and p (p-hat) = 0.9, construct a 95% confidence %3D interval. Give your answers to three…

A: Givensample size(n)=100p^=0.9α=1-0.95=0.05α2=0.025zc=zα2=z0.025=1.96   (from z table)

Q: We have developed a new drug used to reduce fever and want to test its efficacy. Ten ER patients who…

A: First temperature : mean = 101.97 variance = 1.09 Second temperature : mean = 90.14 variance =…

Q: Based on responses of 1467 subjects in General Social Surveys, a 95% confidence interval for the…

A: A confidence interval refers to the amount of uncertainty associated with a sample population…

Q: If n=16, ¯xx¯(x-bar)=46, and s=12, construct a confidence interval at a 95% confidence level. Assume…

A: Given n=16 x=46 s=12 CL=95% Data is normally distributed

Q: We have presented a confidence interval (CI) for the difference, μ1 − μ2, between two population…

A: It is given that the 99% confidence interval for the difference between two population  means is…

Q: Suppose we wanted to estimate the average amount of sleep (in hours) a college student gets a night.…

A: Confidence interval : Confidence interval is a range of values it contains the true population…

Q: Suppose the data in the table below was found from a case-control study.  What measure of…

A: Provided data in the table was found from a case-control study. We need to construct the 95%…

Q: We take a sample of 50 people and obtain a sample mean of 147 pounds with a standard deviation of 15…

A: We have given that  Sample size n = 50 Sample mean = 147 Standard deviation = 15 90%confidence…

Q: If n = 560 and X = 448, construct a 95% confidence interval for the population proportion, p. %3D…

A:

Q: If n=10, ī(x-bar)=37, and s=19, construct a confidence interval at a 95% confidence level. Assume…

A: From the provided information, Sample size (n) = 10 Sample mean (x̄) = 37 Standard deviation (s) =…

Q: Levels of insoluble ash (gm/kg) were measured in a sample of small (0.3 gm) aliquots of dried and…

A: Given information: The given confidence levels are: 95%, 90%, 85% The given confidence intervals…

Q: If n=15, ¯xx¯(x-bar)=30, and s=2, construct a confidence interval at a 98% confidence level. Assume…

A: Given Sample size n = 15  degree of freedom = n-1 =14 x the level of confidence interval   98 %…

Q: A certain test preparation course is designed to help students improve their scores on the GRE exam.…

A: Obtain the 95% confidence interval for the average net change in a student's score after completing…

Q: In each of Exercises, use the technology of your choice to decide whether applying the t-interval…

A: The following assumptions are required for the small sample confidence interval about mean to be…

Q: If n=19, ¯xx¯(x-bar)=37, and s=13, construct a confidence interval at a 99% confidence level. Assume…

A:

Q: n=31, ¯xx¯(x-bar)=30, and s=5, construct a confidence interval at a 98% confidence level. Assume the…

A:

Q: A certain test preparation course is designed to help students improve their scores on the GRE exam.…

A: Given data is6,12,11,13,26sample size(n)=5confidence level=95%

Q: Identify the t-score for a 90% confidence interval if the sample size is 25. t = The answer isnt…

A: We have given that Confidence level (c) = 90% = 0.90 Significance level (α) = 1 - c = 1 - 0.90 =…

Q: A certain test preparation course is designed to help students improve their scores on the USMLE…

A: Given data isLet "x"denotes the given data setx={15,20,18,15,20,18}sample size(n)=6Step-1:- Mean(x)…

Q: If n=17, (x-bar)-45, and o =12, construct a confidence interval at a 80% confidence level. Assume…

A: Given X-bar=45 S=12 n=17

Q: In a survey, 1000 adults in a certain country were asked how many hours they worked in the previous…

A: Confidence interval used to obtain the range where the population true mean lies. It explain the…

Q: If n=540 and (p-hat) = 0.13, construct a 99% confidence interval. Give your answers to three…

A: We have given that,  Sample size (n) = 540  Sample proportion (p-hat) = 0.13 Then,  We will find the…

Q: Sales of trumpets in a day is modeled as Normal. A random sample of 36 days is looked at. The sample…

A:

Q: The yield of a chemical process is being studied. From previous experience yield is known to be…

A: Given that The data is normally distributed . The past 5 days of plant operation have resulted in…

Q: “Over 24 weeks, systolic blood pressure in the low-carbohydrate diet group decreased by 9.6 mm Hg…

A: Confidence interval is an estimation technique is statistics.

Q: A certain test preparation course is designed to help students improve their scores on the GRE exam.…

A:

Q: If n=15, ¯xx¯(x-bar)=40, and s=9, construct a confidence interval at a 98% confidence level. Assume…

A:

Q: Construct a 9595​% confidence interval of the population proportion using the given information. x…

A: Given,x=175n=250α=1-0.95=0.05α2 =0.025Z0.025 =1.96Sample proportion(p^)=Xn p^ =175250 =0.71-p^…

Q: When you calculate a Confidence Interval (CI) for the difference between two population mean values,…

A: If the confidence interval CI for the difference between the two population mean includes zero, then…

Q: If n = 180 and X = 144, construct a 99% confidence interval for the population proportion, p. Give…

A:

Q: If n=15, ¯xx¯(x-bar)=33, and s=19, construct a confidence interval at a 80% confidence level. Assume…

A: Given' :  sample mean xbar=33  sample size n=15  sample standard deviations s=14  then to find 80%…

Q: A sample of 30 beams has an average strength of 1908.8 lbs. and s = 327.1. what is the 95%…

A:

Q: f n=19, sample mean=50, and s =8, construct a confidence interval at a 99% confidence level. Assume…

A:

Q: If n = 530 and X = 424, construct a 99% confidence interval for the population proportion, p. Give…

A:

Q: We are interested in estimating the average amount spent per customer for lunch in a restaurant at…

A:

Q: The results below are based on data collected on campus as part of a student project for an…

A: Given:-               Data was collected to compare the proportion of "Greeks" and non-"Greeks" who…

Q: Several students were tested for reaction times (in thousandths of a second) using their right and…

A: From the given data: Right Hand Left Hand Difference 125 149 -24 115 144 -29 159 186 -27…

Q: Find the value of ta/2 and n = 25 for the 90% confidence interval for the mean if the population…

A:

Q: Indentify the t-score for a 95% confidence interval if the sample size is 50 t=

A: Given n=20 CI=95%