Assume that a sample is used to estimate a population mean μ. Find the 99.9% confidence interval for a sample of size 748 with a mean of 76.1 and a standard deviation of 13.8. Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). < μ < Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.

Q: A federal report indicated that 27% of children ages 2 to 5 years old had a good diet – an increase…

A: The provided information are: Sample proportion p^=27%=0.27 Margin of error (E) = 2% = 0.02…

Q: A random sample of 40 adults with no children under the age of 18 years results in a mean daily…

A:

Q: Calculate the minimum sample size required in order to make a 95% confidence interval for a…

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Q: A group of scientists studied the adhesion of various biofilms to solid surfaces for possible use in…

A: The confidence interval to be no wider than 0.55 dyne-cm2 at 90% confidence interval. The margin of…

Q: Suppose that a random sample of 14 recently sold houses in a certain city has a mean sales price of…

A: The following information has been provided: The sample size is n=14. The sample mean is x¯=280000.…

Q: A group of scientists studied the adhesion of various biofilms to solid surfaces for possible use in…

A: The critical value 98% confidence level from the standard normal table (as standard deviation is…

Q: A group of scientists studied the adhesion of various biofilms to solid surfaces for possible use in…

A: Given Information Standard deviation = 0.66 Confidence interval = 0.99 Significance level(α) = 1-…

Q: Suppose that the waiting times for patients at a local hospital are normally distributed with known…

A: population standard deviation σ=30 sample size n=75

Q: 2. Suppose that the sample mean temperature of 31 hot air balloons (in flight) is 97° Celsius with a…

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Q: A random sample of 40 adults with no children under the age of 18 years results in a mean daily…

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Q: A social worker is concerned about the number of prescriptions her elderly clients have. She would…

A: Given: Standard deviation (σ) = 5.2 Margin of error (E) = 2 Confidence level = 99%

Q: To assess the accuracy of a laboratory scale, a standard weight that is known to weigh 1 gram is…

A:

Q: 4. Suppose a sample of 10 participants had their systolic blood pressure measured. The sample had a…

A: Given, sample size = 10 sample mean =124.6 sample standard deviation =10.4

Q: Suppose that it is known that the population standard deviation of recovery time from the flu is 1.8…

A: The sample mean recovery time when treated with multivitamins is,…

Q: A researcher is interested in seeing if the average income of rural families is greater than that of…

A: Given information: for income of rural familiesn1=35x¯1=65210σ1=891for income of urban…

Q: Construct a 94% confidence interval for the difference between the mean lifetimes of two kinds of…

A:

Q: A random sample of 40 adults with no children under the age of 18 years results in a mean daily…

A: GivenMean(x1)=5.03standard deviation(s1)=2.36sample size(n1)=402)Mean(x2)=4.09standard…

Q: Find a 90% confidence interval for the mean daily income this parking garage will generate and…

A: here n = 46 sample mean = 8600$ sample standard deviation  = s= 1300$ here area in both tail =( 1 -…

Q: From the estimation of the population mean of the Year of Education with a 99% confidence interval,…

A: The 99% confidence interval for the the population mean years of education, will signify that, with…

Q: Suppose that a random sample of ten recently sold houses in a certain city has a mean sales price of…

A: Given: x¯=285000s=5000n=10 The degrees of freedom is obtained as below: df=n-1=10-1=9 The critical…

Q: A random sample of 25 students from a large university yields a sample mean GPA of 2.71 with sample…

A: Given Data : Sample Size, n = 25 Sample Mean, x̄ = 2.71 standard…

Q: Construct a 94% confidence interval for the difference between the mean lifetimes of two kinds of…

A: As per our Guidelines we are suppose to answer only one question 3)Givenn1=40            n2=50x1=418…

Q: To assess the accuracy of a laboratory scale, a standard weight that is known to weigh 1 gram is…

A: Followings are the Explanation of the Question Calculate the Sample Mean and Sample Standard…

Q: The life span of a 30-watt LED light is known to be normally distributed with o = 20 hours. A random…

A: Given that Mean = 1020 , n =20 , sigma = 20 ,alpha =0.1 Find C.I lower bound C.I two sided Which…

Q: In order to determine the percentage p of units from certain statistical population which share a…

A:

Q: A physician claims that joggers’ maximal volume oxygen uptake is greater than the average of all…

A: Givensample size(n)=15Mean(x)=40.6standard deviation(s)=6α=0.05

Q: The life span of a 30-watt LED light is known to be normally distributed with o = 20 hours. A random…

A: Given that, the life span of a 30-watt LED light is known to be normally distributed with standard…

Q: 2.The administration at a college wishes to estimate, the proportion of all its entering freshmen…

A: Given;margin of error(E) = 4population standard deviation(σ)= 1.3for confidence level 95%,…

Q: A random sample of 40 adults with no children under the age of 18 years results in a mean daily…

A: Obtain the 95% confidence interval for the mean difference in leisure time between adults with no…

Q: Assume that a simple random sample has been selected from a normally distributed population and test…

A: From the provided information, Sample size (n) = 25 Sample mean (x̅) = 19.6 Sample standard…

Q: To assess the accuracy of a laboratory scale, a standard weight known to weigh 1 gram is repeatedly…

A: Solution: From the given information, confidence level is 0.95, σ=0.01 and E=0.0001.

Q: A report in a research journal states that the average weight loss of people on a certain drug is 17…

A: the mean weight loss of people on this drug, μ, could be as low as 14 lbs.

Q: has a mean life of 480 hours, construct a 99% confidence interval for the mean of the flashlights…

A: here population standard deviation  = 35 sample size  = 150  sample mean   = 480 and Z-critical for…

Q: Suppose that we wish to test whether the population mean is greater than 80, where the population…

A: It is required to test whether the population mean is greater than 80 or not. Here, the population…

Q: A previous study gave (0.23, 0.32) as a confidence interval for p. Find the minimum sample size…

A:

Q: Assume that a sample is used to estimate a population mean u. Find the 99.9% confidence interval for…

A: Given that Sample size n = 66 Sample mean = 52.9 Sample SD = 10.5 The critical value of t at df = (n…

Q: Assume that a simple random sample has been selected from a normally distributed population and test…

A:

Q: A random sample of 40 adults with no children under the age of 18 years results in a mean daily…

A:

Q: To assess the accuracy of a laboratory scale, a standard weight known to weigh 1 gram is repeatedly…

A: The resulting measurement of coin is  0.95, 1.02, 1.01, 0.98.

Q: Suppose that a random sample of 20 recently sold houses In a certain city has a mean sales price of…

A: From the given information, number of sold houses n = 20. Mean sales price  Sample standard…

Q: Suppose that a random sample of 20 recently sold houses in a certain city has a mean sales price of…

A:

Q: A previous study gave (0.11, 0.23) as a confidence interval for p. Find the minimum sample size…

A: Given confidence interval for p is (0.11 , 0.23)Margin of error(E)=0.01confidence level=99%

Q: (a) Determine the minimum sample size required to construct a 99% confidence interval for the…

A: Given ME=0.10 Alpha =0.01

Q: Suppose that the waiting times for patients at a local hospital are normally distributed with known…

A: Solution : Given :  X : Waiting times for patients at a local hospital              σ = 30…

Q: Based on a random sample of 1,120 Americans 15 years of age or older, the mean amount of time spent…

A: Let,  X: The amount of time spent eating or drinking each day by the Americans. Sample size = n =…

Q: A statistical research yields to the sample proportion of a certain feature in a certain community…

A:

Q: Suppose that a state wants to access the public opinion on the proposal that drivers who are 65…

A: Given, Margin of error (MOE)= 0.025   p =probability of success= 0.5

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.