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Author Question: A study of college dropouts models the number of undergraduate credits a student successfully earns ... (Read 65 times)

acwiles

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on: Feb 26, 2023

Question 1

A sample of recorded dog barks is analyzed for decibel intensity. The mean intensity is 62.25 decibels, with a variance of 4.45. If this data set is normally distributed, we would expect approximately 95% of the barks to be within what range?

◦

(58.03, 66.47)


◦

(60.16, 64.36)


◦

(55.92, 66.47)


◦

(53.35, 71.15)



Question 2

A study of college dropouts models the number of undergraduate credits a student successfully earns prior to quitting using an exponential random variable. If the observed average number of credits earned is 22.5, what proportion of students drop out with more than 100 credits, assuming an exponential random variable is appropriate here?

◦

0.0117


◦

0.0392


◦

0.9802


◦

0.2250

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Marked as best answer by acwiles on Feb 26, 2023

jojomac20

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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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acwiles

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Reply 2 on: Feb 26, 2023
:D TYSM

xiaomengxian

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Reply 3 on: Yesterday
Gracias!

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