Construct the confidence interval for the population mean μ   c=0.90 x=7.2, σ=0.6 , n=44 A 90% confidence interval for μ is ?

Q: Independent random samples were selected from two quantitative populations, with sample sizes,…

A: n1=60,n2=70,X1¯=35.2,X2¯=31.2,s1=5.2,s2=3.9

Q: A sample of 49 measurements of tensile strength for roof hangers are calculated to have a mean of…

A: Given data,n=49x=2.45σ=0.25Zc at 95% confidence is 1.96

Q: Determine the sample size required to estimate a population mean to within 19 units given that the…

A: It is needed to find the sample size based on the given confidence level, margin of error and…

Q: Suppose you have selected a random sample of n=9 measurements from a normal distribution. Compare…

A: Given sample size(n)=9degrees of freedom(df)=n-1df=9-1=8

Q: A simple random sample of 40 observations has a mean of 25.  The population standard deviation, σ =…

A: Given values, sample size (n) = 40 Mean = 25 Standard deviation = 5

Q: A simple random sample of 40 items resulted in a sample mean of 25. The population standard…

A:

Q: n=11, ¯x¯(x-bar)=45, and s=8, construct a confidence interval at a 80% confidence level. Assume the…

A: A confidence interval is an interval (corresponding to the kind of interval estimators) that has the…

Q: The confidence interval lower limit and upper limit for a population mean are (83.3, 85.9). What is…

A:

Q: Assume that a sample is used to estimate a population mean μ . Find the 95% confidence interval for…

A:

Q: The average height of a population is unknown. A random sample from the population yields a sample…

A: From the provided information, the sample mean and the standard deviation of the sampling…

Q: You intend to estimate a population mean with a confidence interval. You believe the population to…

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Q: Use technology to construct the confidence intervals for the population variance and the population…

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Q: The standard deviation for a population is o = 7.23. A random sample selected from this population…

A:

Q: A sample of size n= 47 has sample mean x = 57.6 and sample standard deviation s 9.5. Part: 0/ 2 Part…

A:

Q: d = 0.775 sd = 0.903 n=8 Find 99% confidence interval for μx-μy

A: From the provided information, Sample size (n) = 8 Degree of freedom = n – 1 = 8 – 1 = 7 Confidence…

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

A: Here, n=36, x=65.9,  s=4.3, and CL = 0.95. Note that the standard deviation of population is…

Q: You intend to estimate a population mean with a confidence interval. You believe the population to…

A:

Q: Find the critical value zα/2 that corresponds to the confidence level 90​%.     zα/2=________…

A: Given, Confidence level is 90%. The distribution is standard normal distribution.   α = 0.9…

Q: A random sample X₁, X2, X3, ..., X100 is given from a distribution with known varianc Var (X₂) = 81.…

A: Given: random sample X1, X2, X3, . . , X100 is given from a distribution with known variance Var(Xi)…

Q: The 87.19% confidence interval estimate for p was (0.2, 0.38). Find p′ and ME. pp′=  ME=

A: Given87.19% confidence interval estimate for p was (0.2 , 0.38)

Q: you want to obtain a sample to estimate a population mean. based on previous evidence, you believe…

A:

Q: Systolic Blood Pressure (SBP) in individuals aged 15-34 in the community It is known to have an…

A: What we associate with the interval estimate is called confidence level. This probability indicates…

Q: We want to estimate a population mean u of a population with a standard deviation s=12. What size…

A: We have given that,  Population standard deviation (σ) = 12, confidence interval (c.i) = 95% = 0.95…

Q: The standard deviation for a population is sigma = 7.05 . A random sample selected from this…

A:

Q: SAT scores are distributed with a mean of 1,500 and a standard deviation of 300. You are interested…

A: From the provided information, Confidence level = 95% Margin of error (E) = 25 Population standard…

Q: X = 97 S = 23 and n = 36 , and assuming that the population is normally distributed, construct a 90%…

A: From the provided information, Sample size (n) = 36 Sample mean (x̄) = 97 Sample standard deviation…

Q: What is tα/2,df for a 95% confidence interval of the population mean based on a sample of 15…

A: Solution: We have to find the t-critical value (tα/2) at the given significance level 1- 0.95=0.05…

Q: Assume that a sample is used to estimate a population mean μ. Find the 95% confidence interval for…

A: According to the provided information, μ=49.3σ=9.5n=9α=0.05zα/2=1.96     (From standard normal…

Q: We considered the differences between the temperature readings in January 1 of 1968 and 2008 at 51…

A: Given data,x=1.1σ=4.9n=51z value at 90% confidence is Zc=1.645

Q: T.8. Let X16 N(μ, o2). The sample mean X is found to be 16 and the the sample variance S2 is 4. If…

A: The question is about confidence interval Given : Randomly selected obs. ( n ) = 16 Value of sample…

Q: a random sample of eleven people, the mean commute time to work was 27.8 minutes and the standard…

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Q: You would like to construct a  99%  confidence interval to estimate the population mean time it…

A: given data,μ=2.2σ=0.5we have to find out the 99% confidence interval for the given…

Q: random sample of size n = 9 obtained from a normally distributed population with unknown mean u…

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Q: A sample of sizen=44 has sample mean x=54.3 and sample standard deviation s=9.2. Part: 0 / 2 Part 1…

A: Given: n=44s=9.2x¯=54.3 The degrees of freedom is obtained as below: df=n-1=44-1=43 The t* value is…

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

A: As the population standard deviation is not known, we will use t-distribution. Given: Xˉ=16.8 s=13.1…

Q: Assume that a sample is used to estimate a population mean μμ. Find the 95% confidence interval for…

A: From the given information, Consider, the provided data is as given below: Sample size (n)…

Q: (a) Construct a 95% two-sided confidence interval on mean compressive strength. (b) Construct a 99%…

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Q: Assume that we want to construct a confidence interval. Do one of the​ following, as​ appropriate:…

A: Givenn=250x¯=31.6s=6.6c=90%

Q: Assume that a sample is used to estimate a population mean μ. Find the 80% confidence interval for…

A: From the provided information, Sample size (n) = 27 Sample mean (x̅) = 59.7 Sample standard…

Q: The formula used to calculate a confidence interval for the mean of a normal population when n is…

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

Q: You take 7 measurements and obtain a sample mean of M7 = 3.51 and a sample variable of V7 = 0.94.…

A: Number of measurements, n=7. V7=0.94 Confidence level is 0.9 Significance level is 1-0.9=0.1

Q: A random sample of size 49 from normal population yields, mean = 2.6 and standard deviation = 9.7.…

A: n = 49 x¯ = 2.6 s = 9.7 lower bound for 80% ci for population mean = ?

Ratios

A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.

Trigonometric Ratios

Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.