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Asked by arlindab1999 on coursehero.com

The results from a statistics class' first exam are as follows: The average grade obtained on the exam by its 45 students is an 85, with a standard deviation of 15 points. Answer the following based on this information:

What percentage of individuals received a score whose z-score was -.70 or less?

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Answered by galvisjose10 on coursehero.com

$ssssecsecsssssssssssssecssssss$

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<p><span class="eqneditor-formula" data-value="P(Z \leq -0.70)=0.2420\rightarrow 24.20\%"><span class="katex"><span class="katex-mathml"></span><span class="katex-html"><span class="base"><span class="strut" style="height:1em;vertical-align:-.25em;"></span><span class="mord mathnormal" style="margin-right:.13889em;">s</span><span class="mopen">s</span><span class="mord mathnormal" style="margin-right:.07153em;">s</span><span class="mspace" style="margin-right:.2777777777777778em;"></span><span class="mrel">sec</span><span class="mspace" style="margin-right:.2777777777777778em;"></span></span><span class="base"><span class="strut" style="height:1em;vertical-align:-.25em;"></span><span class="mord">sec</span><span class="mord">s</span><span class="mord">s</span><span class="mord">s</span><span class="mord">s</span><span class="mclose">s</span><span class="mspace" style="margin-right:.2777777777777778em;"></span><span class="mrel">s</span><span class="mspace" style="margin-right:.2777777777777778em;"></span></span><span class="base"><span class="strut" style="height:.64444em;vertical-align:0em;"></span><span class="mord">s</span><span class="mord">s</span><span class="mord">s</span><span class="mord">s</span><span class="mord">s</span><span class="mord">s</span><span class="mspace" style="margin-right:.2777777777777778em;"></span><span class="mrel">sec</span><span class="mspace" style="margin-right:.2777777777777778em;"></span></span><span class="base"><span class="strut" style="height:.80556em;vertical-align:-.05556em;"></span><span class="mord">s</span><span class="mord">s</span><span class="mord">s</span><span class="mord">s</span><span class="mord">s</span><span class="mord">s</span></span></span></span></span></p>

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