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Author Question: To perform diagnostics on the consistency of a laboratory scale, multiple measurements are taken ... (Read 77 times)

eboni

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on: Feb 26, 2023

Question 1

To perform diagnostics on the consistency of a laboratory scale, multiple measurements are taken using a reference weight over the course of several days. The variance observed over 20 repeated measures is 248. What is a 99% confidence interval for the measurement variance of this scale?

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(122.129, 688.486)


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(11.051, 26.239)


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(117.809, 633.862)


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(174.034, 413.213)



Question 2

To perform diagnostics on the consistency of a laboratory scale, multiple measurements are taken using a reference weight over the course of several days. The variance observed over 20 repeated measures is 248. A 99% confidence interval for the measurement variance is (122.129, 688.486). Would it be reasonable to believe that the population variance is 670?

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No, because this value is too far above the sample variance of 248.


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Yes, because this value is within the 99% confidence interval.


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No, because a sample size of 20 is too small for estimation purposes.


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We cannot tell without more information.

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Marked as best answer by eboni on Feb 26, 2023

kuttz

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Reply #1 on: Feb 26, 2023
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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eboni

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Reply 2 on: Feb 26, 2023
:D TYSM

cpetit11

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Reply 3 on: Yesterday
Wow, this really help

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