Te 10.1 points DevoreStats 7 E.042 Determine the values of the following quantit

Question

Te 10.1 points DevoreStats 7 E.042 Determine the values of the following quantities. (Round your answers to two decimal places.) My Notes Ask Your (b) x,os. " (c) 30 (d), 30 (e) 3 You may need to use the appropriate table in the Appendix of Tables to answer this question. 10. -0.1 points DevoreStat9 7. E.050 My Notes Ask Your Teacher 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 (229.563, 233.305). You decide that a confidence level of 99% is more 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.) Hz

Explanation / Answer

below are the critical values:

a) 3.94

b)18.49

c)14.95

d)13.79

e)50.89

f)46.98

10) for sammple mean =(upper bound+lower bound)/2 =231.434

and margin of error =(upper bound-lower bound)/2 =1.871

for (n-1) degree of frreedom and 95 as well 99% interval critical t values =2.776 and 4.604 respectively

hence for 99% interval margin of error =1.871*4.604/2.776 =3.103

therfore 99% confidence interval =sample mean -/+ margin of error =228.331 ; 234.537

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