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1. General IntroductionThe PDF (probability density function) plays a critical role among various data sets. The CentralLimit Theorem (CLM) nevertheless enumerates that the sample mean (x?) distribution assumes amore spread progressively normally with the increase in the sample size (n). Ordinarily, a samplesize of not less than n=30 is preferred to gain a normally spread sample mean distribution. Todemonstrate the Central Limit Theorem, one can envision a dice with equally assigned numbersfrom one to six. If we estimate two dice, then we start seeing a tapering on the lower and higherfigures. The PDF sample mean assumes a near-normal spread when the dice is averaged at ten.The statistical principle occupies a central place in several research applications, and it is, attimes, considered practical to obtain samples in the place of scrutinizing the population. Besides,we can derive statistical theorems, including the equality of the sample mean with the samplemean through a normally spread sample.The aim of this lab is to prove the Central Limit Thermos.2. Procedure and Statistical PrincipleOn the outset, there were six distinct excel pages created as a worksheet. They comprised“Uniform Random Number 10”, “Exponential Random Number 10”, “Histogram 10”, “UniformRandom Number 30”, “Exponential random Number 30,” and “Histogram 30” Thecategorization helps organize and label data. Ten columns of 110 evenly distributed randomnumbers beginning from 0 to 1 were designed with the RAND function, which is an exclusivelyregularly distributed data set similar to the dice comparison cited earlier. In the next step, datawas applied to create our increasingly spread data set on the second page based on the equationbelow.?(?) = ??^(???) for x>0The lambda value of .1 was arrived through the division as indicated (applying -LN(1-x)/.1 inExcel). The function assists in creating our PDF based on the exponential equation expressed bythe e base and -x? power. Several other possibilities could illustrate similar statistical concepts.A histogram of the data was created by first deciding the number of bins required. The countingof the number of data points (n) was then done and the square root of the figures taken todetermine the number of bins. For each data set, the number of bins was established.Additionally, the bin size was obtained from every data set. The calculation was achieved bydividing the bin range by adding bin size to the preceding bin to achieve the desired number ofbins. Finally, the descriptive statistics add-ons were applied to develop a histogram. The originaldata was gathered, and histogram bins obtained before formatting of the plot area to form ahistogram for the values in histogram 10 tab. The histogram is illustrated below.The next step involved the computation of 110 sample mean values (x?) from the highlydistributed values, which was achieved by computing the average for each row in the exponentialrandom number 10 tab. Consequently, a histogram was created in the manner of the procedureadopted above but applying the sample mean in the place of raw data. As illustrated below, thehistogram is expected to show a normal distribution. It was ascertained through creation of anormality plot. In this regard, the guidelines in the textbook were adopted to plot zi vs xi thatshould be more or less linear with a higher concentration near the center of the values. The valueof x was arranged from low to high and the z values calculated following the equation P(Z<=z)=(j-./n) where j is the integer order of the selected x data To compute these values.Finally, the same procedure was applied for the above values, but 30 columns were used in theplace of ten in this case.3. Results and Discussion:Six different figures were developed through this experiment (3 for n=10 and 3 for n=30 samplesizes). The results were histograms of the randomly picked numbers, and the correspondingestimates. Every figure communicated varied information. In total, however, the proof of theCentral Limit Theorem was accomplished.Initially, the histograms from the primary data showed the lack of uniformity in the set ofnumbers that were at the start followed by the equations that were created. This realizationproved that the Central Limit Theorem is applicable for all kinds of PDF’s beside the uniformPDFs in the introduction.The Histograms of the estimated values are considered very critical in this aspect of the lab.They enabled the visualization of the transformation from the exponential curve in the precedinghistograms to a balanced “bell curve” shape. Nevertheless, human sight is deceptive in scaling,and other plotting aspects could blur our judgment. To verify the normality of the sample meanhistograms, a near-linear spread of the data in the normality plots were observed.In the end, enhancing the sample size to thirty increased the normality of the sample mean inaccordance with the Central Limit Theorem as earlier predicted. The normality plot had a valueof n=30 was more linear with limited skewness and showed that the histogram was normal.Experimental errors are expected in this nature of the experiment, and the application of Excel tocreate random numbers significantly minimizes bias because they are system generated. Inaddition, all the computations were managed from the Excel environment and, as such,interaction from the cells was expected to be clear. Nevertheless, Excel doesn’t have anapplication that calculates all random numbers with the creation of each new cell. This was ahuddle that was jumped by using the copy and pasting the data strictly from the value in each celland not the equation. However, it is expected that some information would be lost when creatinghistograms. The outlined procedure was followed, but the histogram inherently fails toincorporate details in the bins. Nonetheless, a second figure for referencing was incorporated inthe normality plots.4. ConclusionThe steps taken in the lab demonstrate the regularizing power of the Central Limit Theorem. Theprocedure was done by obtaining the sample mean from the highly spread data and consequentlydeveloping a normally distributed sample mean sets. Histograms and normality plots werecritical in illustrating this position. Besides, the initial experiment was improved from the initialstatus by enhancing the sample size from 10 to 30. Based on the propositions of the CentralLimit Theorem, a bigger sample size improves the normality of the sample means.As a general rule, this statistical tool is quite useful as it enables the normalization of datawithout the difficulty initially experienced. Following the normalization, known statisticalprinciples like Z-scores and T-scores for additional analysis (i.e. statistical significance andhypothesis testing)5. Future ApplicationAs indicated earlier, the Central Limit Theorem is a statistical tool that is used by manyspecialists, including scientists and engineers on a regular basis. In the bioengineering field, thisprocess is used to comprehend non-normal data sets. The totality of the bioengineering field ispremised on applying its tools to enhance the health conditions and provide remedies fordiseases. The process begins with an analysis of the target population. Several companies in SaltLake Valley, for instance, specialize in the manufacture of devices that manage cardiovasculardiseases like stents and balloons to expand arteries (as a measure against atherosclerosis andstenosis). The process is also used to manage implantable cardioverter defibrillators andpacemakers that manage the heartbeat (and prevent heart attack). Whereas the general publiccould suffer from heart ailments, it would be cumbersome to test every individual using theequipment. There is needed to carefully identify individuals who are a reasonable patient that canbenefit from the devices. To accomplish this, data about the distribution of heart disease withrespect to age. As expected, the process would yield non-uniform results. A search from theinternet for blood pressure and congestive heart failure show a skewness in favor of olderpopulations. It is a reasonable expectation and helps in inquiries about the mean and standarddeviation, among other statistical computations of the data. Observation of the raw data poses achallenge in this respect. In this regard, the Central Limit Theorem is used.A sample of 100 patients can be considered as an example. The patients may present with highblood pressure from across the country in various hospitals. Although several methodologiescould be applied, the most preferred would be a random selection of the respondents in differenthospitals and documentation of their age, among other factors. The sample size of 100 ispractical considering that it is collected from across the country. Nevertheless, based on theCentral Limit Theorem, there will need to create a normal sample mean distribution. Continuouscollection of more samples will enable the establishment of a normally distributed data set ofsample means as previously ascertained. In this regard, the sample means are normalized and canenable testing of the probability of its impact on a given age range with respect to high bloodpressure and other heart diseases of interest (If similar tests are performed under differentconditions). With the information thus obtained, statistics could be used to determine the needfor further devise intervention. The example below illustrates the kind of raw data that can becollected.