random sample of 28 items is drawn from a population whose standard deviation is unknown. The sample mean is = 790 and the sample standard deviation is s= 15.  a. Construct an interval estimate of u with 99% confidence. (Round your answers to 3 decimal places. ) The 99% confidence interval is from ____to ____ b. Construct an interval estimate with u with 99% confidence, assuming that s=30. (Round your answers to 3 decimal places.) The 99% confidence interval is from ____to____ c. Construct an interval estimate of u with 99% confidence, assuming that s=60. (Round your answers to 3 decimal places.)

Q: Patients coming to a medical clinic have a mean weight of 207.6 pounds, with a standard deviation of…

A: given, From given information,we have Mean() = 207.6 pounds Standard deviation() = 22.6 pounds By…

Q: A random sample of 92 observations produced a mean x =25.9 and a standard deviations=2.5. a. Find a…

A:

Q: cosh(7)=

A: cosh is hyperbolic function. Formula for cosh is given by, cosh(x) = ex+e-x2

Q: e: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the…

A: Sample size n =47 Sample mean=109 Population standard deviation =32

Q: Assume that adults have IQ scores that are normally distributed with a mean of 101.2 and a standard…

A:

Q: A sample of 1110 observations taken from a population produced a sample proportion of 0.32. Make a…

A: The point estimate of population proportion is sample proportion.Margin of error=zα2p^×q^n…

Q: A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the…

A:

Q: Calculate the​ 95% confidence intervals for the proportion of children​ surviving, and the…

A: Given information: Count = 711 Adult/Child Frequency Relative Frequency Adult 654 0.91983122…

Q: A population has a mean u = 70 and a standard deviation o = 30. Find the mean and standard deviation…

A: Mean = 70 Standard deviation = 30

Q: We provide a sample mean, sample size, sample standard deviation, and confidence level. a. use the…

A:

Q: statistics practitioner took a random sample of 41 observations from a population whose standard…

A: Formula :

Q: A statistics practitioner took a random sample of 43 observations from a population whose standard…

A: It is given that, Sample mean = 101. Population standard deviation, sigma is 20. The sample size, n…

Q: ssume that adults have IQ scores that are normally distributed with a mean of 96.9 and a standard…

A: Given Information:  Mean (x)  = 96.9  Standard Deviation (s) = 23.6

Q: Assume that adults have IQ scores that are normally distributed with a mean of 102.9 and a standard…

A:

Q: A random sample of 87 observations produced a mean x=25.6 and a standard deviation s=2.6. a. Find a​…

A: We assume that the population is normally distracted.

Q: A statistics practitioner took a random sample of 45 observations from a population whose standard…

A: Confidence interval is a part of interval estimation, which is used to estimate the unknown value of…

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ=105 and a standard…

A: Let "X" be the IQ score of the adults.

Q: You measure the weights of a simple random sample of 64 people from a population. The sample mean is…

A: Provided information is ; sample size(n) = 64 sample mean(x¯ ) = 55 kg Population standard deviation…

Q: Assume that population mean is to be estimated from the sample described. Use the sample results to…

A: Given95% confidence interval N=361 x = 59.1 seconds. z= 4.9 SecondsFind the margin of error?

Q: The probability that a randomly selected adult has an IQ less than 128 is (Type an integer or…

A: Given:  Consider X as a random variable that follows a normal distribution with mean 22 and…

Q: population has a mean u =163 and a standard deviation o = 28. Find the mean and standard deviation…

A: μx¯ = μ

Q: A statistics practitioner took a random sample of 43 Note: For each confidence interval, enter your…

A: n = 43 standard deviation = 27 mean = 104 95% confidence interval for mean is given by  x±zα2*σn 104…

Q: Assume that a sample is used to estimate a population mean μμ. Find the 90% confidence interval for…

A: From the provided information, Sample size (n) = 36 Mean (x̅) = 75.5 Standard deviation (s) = 15.5…

Q: 24. Bob draws a simple random sample from an original population where the standard deviation is…

A:

Q: in order to evaluate two methods of teaching statistics students were randomly assigned to two…

A:

Q: Assume that a sample is used to estimate a population mean μμ. Find the 99.5% confidence interval…

A: Since population is unknown, use t-distribution to find t-critical value. t-critical value: Refer…

Q: We provide a sample mean, sample size, sample standard deviation, and confidence level. a. use the…

A: It is given that the sample mean is 35, the sample size is 25 and the sample standard deviation is…

Q: Bob draws a simple random sample from a massive original population. The sample size is n=41 and the…

A:

Q: Use a t-distribution to find a confidence interval for the difference in means μ = μ₁-₂ using the…

A: From the provided information, Sample size (n) = 8

Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

A: Find the 99% confidence interval for the population mean score of students: Denote the population…

Q: X y Z 52 124 79 69 137 83 For Table 2, determine the confidence intervals of: 1. The mathematical…

A: GivenXYZ52124796913783461269339134673313395

Q: A sample ofn= 25 scores has a mean of M = 72 with SS = 960. Use the sample to construct the 95%…

A:

Q: A statistics practitioner took a random sample of 57 observations from a population whose standard…

A:

Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

A: We have to find confidence interval of given data..

Q: A statistics practitioner took a random sample of 52 observations from a population whose standard…

A:

Q: A statistics practitioner took a random sample of 59 observations from a population whose standard…

A: sample size(n)=59 Population standard deviation(σ)=32 Mean(x)=95

Q: A statistics practitioner took a random sample of 49 observations from a population and computed the…

A: According to the given information in this question, we need to answer three subparts

Q: A statistics practitioner took a random sample of 43 observations from a population whose standard…

A: We have given that,  sample mean (x̄) = 109, standard deviation (σ) = 30 and sample size (n) = 43

Q: We provide a sample mean, sample size, sample standard deviation, and confidence level. a. use the…

A: It is given that the sample mean is 50, the sample size is 16, the sample standard deviation is 5…

Q: Assume that adults have IQ scores that are normally distributed with a mean of u = 100 and a…

A: Let X be the random variable from normal distribution with mean (μ) = 100 and standard deviation (σ)…

Q: Suppose you take a random sample of n = 80 Douglas College students and ask each student their age.…

A: Solution: Let X be the age of Douglas college students. From the given information, x-bar=22.0375…

Q: Find the 95% confidence interval for the population mean if the sample is × = 70.4 and the sample…

A: Given that  Sample size n= 24 Sample mean=70.4 Standard deviation =5

Q: Assume the population is normally distributed

A: Step 1: State the given: population mean, µ = 250sample mean, x̄ = 280sample standard deviation, s =…

Q: A variable of a population has a normal distribution. Suppose that you want to find a confidence…

A: a)Following assumptions are required for the large sample confidence interval about mean to be…

Q: Tina catches a 14-pound bass.  She does not know the population mean or standard deviation.  So she…

A: From the provided information, The data values are as follow: 9, 12, 13, 10 and 10 Sample size (n) =…

Q: If [0.64, 0.82] is a confidence interval for the population proporlion. Find the value of the point…

A: