(16.14) A laboratory scale is known to have a standard deviation of = 0.001 gram

Question

(16.14) A laboratory scale is known to have a standard deviation of = 0.001 gram in repeated weighings. Scale readings in repeated weighings are Normally distributed, with mean equal to the true weight of the specimen. Three weighings of a specimen on this scale give 3.412, 3.416, and 3.414 grams.

Another specimen is weighed 8 times on this scale. The average weight is 4.1602 grams. A 99% confidence interval for the true weight of this specimen is

4.1602 0.00069. 4.1602 0.00091. 4.1602 0.00032. eBook

Explanation / Answer

Here it is given that sd=0.001 and z value =2.578

So Margin of Error=E=z*sd/sqrt(n)=2.578*0.001/sqrt(8)=0.00091

So answer is 41602+/-0.00091

Related Questions

Navigate

• Browse (All)
• Browse #
• Subjects

---

---

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