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Author Question: A quiz consists of 20 multiple choice questions, each with five possible answers, only one of which ... (Read 94 times)

lilldybug07

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on: Jan 16, 2020
A quiz consists of 20 multiple choice questions, each with five possible answers, only one of which is correct. If a student guesses on each question, what is the mean and standard deviation of the number of correct answers?
◦ mean: 4; standard deviation: 2
◦ mean: 4; standard deviation: 1.78885438
◦ mean: 10; standard deviation: 3.16227766
◦ mean: 10; standard deviation: 1.78885438
Statistics: Informed Decisions Using Data ¦ Sullivan ¦ 5th Edition
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Marked as best answer by lilldybug07 on Jan 16, 2020

Sarahjh

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Reply #1 on: Jan 16, 2020
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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Only 25% of students answer this correctly


lilldybug07

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Reply 2 on: Jan 16, 2020
Wow, this really help

miss.ashley

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Reply 3 on: Yesterday
Gracias!

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