A journal article reports that a sample of size 5 was used as a basis for calculating a 95% CI for the true average natural frequency (Hz) of delaminated beams of a certain type. The resulting interval was (229.969, 233.699). You decide that a confidence level of 99% ismore appropriate than the 95% level used. What are the limits of the 99% interval? [Hint: Use the center of the interval and its width to determine x and s.] (Round your answers to three decimal places.)n USE SALT229.379X 234.289|× ) HzYou may need to use the appropriate table in the Appendix of Tables to answer this question.

We want to find 99% CI for population mean (μ)

Answered: A journal article reports that a sample…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Brain Volume Using all of the brain volumes listed in Data Set 8 “IQ and Brain Size”, we get this 95% confidence interval estimate: 9027.8 < σ2 < 33,299.8, and the units of measurement are (cm3)2. Identify the corresponding confidence interval estimate of σ and include the appropriate units. Given that the original values are whole numbers, round the limits using the round-off rule given in this section. Write a statement that correctly interprets the confidence interval estimate of σ.
The information from #2 is: Z a/2=1.960 CI=(0.7446,0.8554) I attached question #2 for reference but need #5 answered.
It has been reported that on average, college students spent 3 hours per day watching YouTube. A sample of 12 college students have been taken and time in hour (x) they spent watching YouTube have been recorded as follow: 4.2 a 1.8 3.1 4.4 1.3 2.7 3.9 4.3 0.8 3.4 6.1 a) Given that that use the formula to determine the point estimators of population mean and standard deviation. b) Find a 90% and 95% confidence interval for population mean. What can you summarize from the findings when we increase the confidence level from 90% to 95%?
Solve the following problem and give as an answer the LEFT limit of the confidence interval. Write up to two decimal places without rounding. The anthropologist William Howells took data on cranial distances of remains found in Yauyos, Peru. One of the measurements is the distance between basion and bregma, denoted BBH, the data collected in his sample is shown below. Mean: 122.43mm Std Deviation: 3.5159mm The sample size is 101. finds a confidence interval for the variance of the BBH measure of the remains found in Yauyos with a confidence level of 90%.
4. The resilient moduli of 10 samples of a clay mixture are measured and the sample mean is x = 19.50. If an experimenter wishes to use a "known" value o = 1.0 for the standard deviation of the resilient modulus measurements based upon prior experience, construct appropriate 90%, 95%, and 99% two-sided confidence intervals for the average resilient modulus µ. Compare the lengths of the confidence intervals. Do you think it is plausible that the average resilient modulus is equal to 20.0?
The heights of the 1320 lower school students at Poole High School are normally distributed with mean µ and with a standard deviation of 10cm. A sample of size 25 is taken and the mean height of the sample is found to be 161cm. a.) Find the 95% confidence interval for the height of the students.
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All Grace Bo... (1) THE SIYL... Pf ICampuS Login Bb WeeK TI - M... ALEKS Sha... B6 Thread: Wee... O CONFIDENCE INTERVALS AND HYPOTHES. Confidence interval for the... A laboratory in Arizona is imerested in finding the mean chloride level for a healthy resident in the state. A random sample of 90 healthy residents has a mean chloride level of 103 mEq If it is known that the L chloride levels in healthy individuals residing in Arizona have a standard deviation of 42 mEq, find a 95% confidence interval for the true mean L' chloride level of all healthy Arizona residents. Then give its lower limit and upper limit. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) Lower limit: I Upper limit: I Explanation Check Terms of Uee P Y AccOssibility
Find the confidence interval for a Related-Samples t-test (Ch.11), given the following info: Level of confidence = 99% Before and After scores = see table below SSD (SS of the difference scores) = 2.75 Hint: as you’re doing calculations, don’t round any numbers in your calculations to less than two decimal places, or your final answer may be too rounded for you to be able to tell which answer below is correct. Person Before X1 After X2 Difference (D = X2- X1) A 15 22 +7 B 18 23 +5 C 12 17 +5 D 17 23 +6 A. 1.90 < μD < 7.18 B. 2.53 < μD < 8.02 C. 2.95 < μD < 8.55 D. 2.01 < μD < 7.58
How many adults should be involved in this study in order to have the mean age estimated up to ±6 months with 92% and 98% confidence levels?
6.2.3 Find the critical value t, for the confidence level c=0.80 and sample size n= 12. tents Click the icon to view the t-distribution table. Resources t.=(Round to the nearest thousandth as needed.)

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