Question

An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range:

418 421 422 422 426 429 430 434 436 439 446 447 449 453 457 463 465

(c) Calculate a two-sided 95% confidence interval for true average degree of polymerization. (Round your answers to two decimal places.)

( , )

Answer #1

Sample mean =438.65

Sample standard deviation =15.227

Sample size =17

Level of significance=1-0.95=0.05

Degree of freedom =16

t critical value is (by using t table)=2.12

Confidence interval formula is

=(430.82, 446.48)

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An article contained the following observations on degree of
polymerization for paper specimens for which viscosity times
concentration fell in a certain middle range:
415
420
421
423
425
428
432
435
437
438
445
446
449
451
457
461
464
(c) Calculate a two-sided 95% confidence interval for true
average degree of polymerization. (Round your answers to two
decimal places.)

An article contained the following observations on degree of
polymerization for paper specimens for which viscosity times
concentration fell in a certain middle range:
418
420
421
423
425
429
432
435
436
439
445
446
448
452
456
461
464
1.Comment on any interesting features. (Select all that
apply.)
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