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Author Question: A normal distribution has a mean of 55, and about 25% of the values are above 65. Approximately what ... (Read 76 times)

vHAUNG6011

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on: May 26, 2021

Question 1

Let X have density function f(x), where f(x) = when x ≥  1.  Find the mean and standard deviation of X.
◦ μ = 1,  σ = 3
◦ μ = 2,  σ = 3
◦ μ = 2,  σ = 2
◦ μ = 2,  σ = does not exist
◦ neither the mean nor the standard deviation exist

Question 2

A normal distribution has a mean of 55, and about 25% of the values are above 65.  Approximately what is the standard deviation for this distribution?
◦ 13
◦ 18
◦ 20
◦ 15
◦ 10
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Marked as best answer by vHAUNG6011 on May 26, 2021

Carissamariew

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Reply #1 on: May 26, 2021
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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vHAUNG6011

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Reply 2 on: May 26, 2021
:D TYSM

nguyenhoanhat

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Reply 3 on: Yesterday
Wow, this really help

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