An article contained the following observations on degree of polymerization for

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: 418 421 421 423 426 428 430 434 437 438 446 447 450 452 458 462 464 (a) Construct a boxplot of the data 420 430 440 450 420 430 440 450 460 420 430 420 430 440 450 460 440 450 460 Comment on any interesting features. (Select all that apply.) There is little or no skew. The data is strongly skewed is one outlier The data appears to be centered near 429 There are no outliers. The data appears to be centered near 439 (b) Is it plausible that the given sample observations were selected from a normal distribution? Yes O No (c) Calculate a two-sided 95% confidence interval for true average degree of polymerization. (Round your answers to two decimal places.)

Explanation / Answer

CI for = 95%

n = 17

mean = 438.5294

t-value of 95% CI = 2.1199

std. dev. = 15.125

SE = std.dev./sqrt(n) = 3.66835

ME = t*SE = 7.77656

Lower Limit = Mean - ME = 430.75285

Upper Limit = Mean + ME = 446.30597

95% CI (430.7529 , 446.306 )

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.