math genius pleaz help me on ap stat

Test Preparation AP Test Preparation
1

<p>I am just struggling with this quetion for 2 hours.</p>

<li>A lunch stand in the business distric has a mean daily groww income of $420 with a standard deciation of $50. Assume that the daily gross income is normally distributed. </li>
</ol>

<p>a. If a randomly selected day has a gross imcome of $520, then how many standard deviations away from the mean is that day’s gross income?</p>

<p>b. Determine the standardized value for the daily inome of $520.</p>

<p>c. what is the relative frequency corresponding to a daily groww income of $ or more?</p>

<p>anyone taking AP STAT? ap stat is hard… :(</p>

2

<p>a.) $520 - $420 = $80 away from the mean. Let’s translate that into SD’s = $50. </p>

<p>$80 x (1 SD / $50) = **1.6 SD<a href=“sorta%20like%20dimensional%20analysis%20in%20chemistry”>/B</a></p>