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 <question type="category"><category><text>Normal Probability Distributions/Normal Distributions: Finding Probabilities</text></category></question>
 
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      <text>Question 29</text>
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      <text><![CDATA[<p><span style="font-size: medium;"><strong><span style="font-family: 'times new roman',times,serif;">Battery Life Spans</span></strong></span></p>
<p><span style="font-family: 'times new roman',times,serif; font-size: medium;">The life span of a battery is normally distributed, with a mean of 2000 hours and a standard deviation of 30 hours.  </span></p>
<ol>
<li><span class="Apple-style-span" style="font-family: 'times new roman',times,serif; font-size: medium;">What percent (to three significant figures) of batteries have a life span that is more than 2065 hours?<br />{#1}%<br /><br /></span></li>
<li><span class="Apple-style-span" style="font-family: 'times new roman',times,serif; font-size: medium;">Would it be unusual for a battery to have a life span that is more than 2065 hours?<br />{#2}</span></li>
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    <defaultgrade>2.0000000</defaultgrade>
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