Bell curve overlay on histogram

dan345

New Member
Joined
Mar 6, 2011
Messages
19
Hi,

with the following data, i have created a histogram. However, how do you create a curve overlay on the histogram, such that the curve flows with the bars to make it look like a normal distrubtion curve.

thanks


<table width="1094" border="0" cellpadding="0" cellspacing="0"><col style="width: 96pt;" width="128"> <col style="width: 120pt;" width="160"> <col style="width: 69pt;" width="92"> <col style="width: 170pt;" width="226"> <col style="width: 270pt;" width="360"> <col style="width: 96pt;" width="128"> <tbody><tr style="height: 15pt;" height="20"> <td style="height: 15pt; width: 96pt;" width="128" height="20">
</td> <td style="width: 120pt;" width="160">
</td> <td style="width: 69pt;" width="92">
</td> <td class="xl66" style="width: 170pt;" width="226">Starting bin:</td> <td style="width: 270pt;" width="360">-3</td> <td style="width: 96pt;" width="128">
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td>
</td> <td>
</td> <td class="xl66">Scotts choice (h):</td> <td>=3.5*STDEV(B4:B1003)/POWER(COUNT(B4:B1003),(1/3))</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl66">Data Source</td> <td class="xl66">Bin no</td> <td class="xl66">Bins</td> <td class="xl66">Frequency</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.4</td> <td>0</td> <td>=E1+(C4*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.8</td> <td>1</td> <td>=E1+(C5*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.8</td> <td>2</td> <td>=E1+(C6*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">11.2</td> <td>3</td> <td>=E1+(C7*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.4</td> <td>4</td> <td>=E1+(C8*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.4</td> <td>5</td> <td>=E1+(C9*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.9</td> <td>6</td> <td>=E1+(C10*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.3</td> <td>7</td> <td>=E1+(C11*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.8</td> <td>8</td> <td>=E1+(C12*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.5</td> <td>9</td> <td>=E1+(C13*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">6.7</td> <td>10</td> <td>=E1+(C14*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.5</td> <td>11</td> <td>=E1+(C15*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">5.6</td> <td>12</td> <td>=E1+(C16*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.8</td> <td>13</td> <td>=E1+(C17*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">8.9</td> <td>14</td> <td>=E1+(C18*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">8.9</td> <td>15</td> <td>=E1+(C19*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">8.5</td> <td>16</td> <td>=E1+(C20*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">8.1</td> <td>17</td> <td>=E1+(C21*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.4</td> <td>18</td> <td>=E1+(C22*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.9</td> <td>19</td> <td>=E1+(C23*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">8.9</td> <td>20</td> <td>=E1+(C24*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.6</td> <td>21</td> <td>=E1+(C25*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.9</td> <td>22</td> <td>=E1+(C26*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">8.5</td> <td>23</td> <td>=E1+(C27*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">6.9</td> <td>24</td> <td>=E1+(C28*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">6.3</td> <td>25</td> <td>=E1+(C29*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.6</td> <td>26</td> <td>=E1+(C30*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.9</td> <td>27</td> <td>=E1+(C31*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.1</td> <td>28</td> <td>=E1+(C32*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.8</td> <td>29</td> <td>=E1+(C33*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">6.7</td> <td>30</td> <td>=E1+(C34*E2)</td> <td>=FREQUENCY(B4:B1003,D4:D34)</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">6.9</td> <td>
</td> <td>
</td> <td>
</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">8.3</td> <td>
</td> <td>
</td> <td>
</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">6.9</td> <td>
</td> <td>
</td> <td>
</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">5.2</td> <td>
</td> <td>
</td> <td>
</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.8</td> <td>
</td> <td>
</td> <td>
</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.8</td> <td>
</td> <td>
</td> <td>
</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">8.1</td> <td>
</td> <td>
</td> <td>
</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">5.7</td> <td>
</td> <td>
</td> <td>
</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.3</td> <td>
</td> <td>
</td> <td>
</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.3</td> <td>
</td> <td>
</td> <td>
</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">8.8</td> <td>
</td> <td>
</td> <td>
</td> <td>
</td> </tr> <tr style="height: 15pt;" height="20"> <td style="height: 15pt;" height="20">
</td> <td class="xl65">7.5</td> <td>
</td> <td>
</td> <td>
</td></tr></tbody></table>
 

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