Standard Deviation Reports Samples For Students

Comparison of sales volumes

The mean is the average of values in a given set of data. In this case, the average sales volume gives the average volume of sales for each salesperson over the six week period. The means can be used to compare the sales volumes of the four salespersons and rank them. The mean is obtained by getting the sum of the volume of sales for all the six weeks then dividing by the number of weeks under consideration.

Determination of the mean volume of sales

Mean volume of sales = Total sales/6 weeks
Salesperson A = (1774 + 1808 + 1890 + 1932 + 1855 + 1726)/6
= 10985/6
= 1830.83
Salesperson B = (2205 + ...

Project scheduling

It is difficult to determine the expected duration of activities of the project accurately. The triple time estimates give a reliable measure of the project completion period (Collins, 2011). The triple time estimates are used to determine the time, standard deviation and the variance for each activity as well as the entire project. The following formula gives the activity times:
Activity time = (Optimistic time+4×Most likely time+pessimistic time)6
Standard deviation = (Pessimistic time- Optimistic time)6

Network diagram

The above network diagram indicates that the project will be completed in 72.67 days. The total duration of the critical path ...

Abstract

The question of memory has been an interesting one in psychology for some time. Brown-Peterson hypothesized that distraction tasks have a role to play in how well our memory works, and that this can be measured by a simple task. This research uses a modified version of their experiment to assess their hypothesis. The task involves memorizing a three letter trigram and then taking part in a backwards counting task that was designed as a distractor. 112 participants took part in this experiment. They were asked to complete twenty control trials in which they had to continue counting backwards ...

Abstract

The phenomenon of apparent motion occurs when two stimuli are separated by a flash or a blank in which the brain creates the effect of movement. It can be compared to the effects of moving pictures, for example, in which a series of still photographs are put together in such a way that the image appears to be moving. The purpose of this research is to assess the phenomenon of apparent motion in terms of the interstimulus interval, the gap between two stimuli that most accurately conveys movement to the perceiver. The study used five different dot spacings, and ...

Report on the relationship between assets and sales

Executive summary
A company’s investment in foreign assets has a bearing on the amount of foreign sales it makes. The regression analysis indicates a positive association between the ratio of foreign sales to total sales and the ratio of foreign assets to total assets. This implies that transnational companies should invest more in foreign assets to improve their foreign sales. They should also consider other factors affecting foreign sales such as international marketing strategies including advertising expenditure, among others. Investment in foreign assets is not the only contributor to foreign sales as indicated by the model’s coefficient ...

Abstract

Handwashing is an important process in controlling microorganism transmission and infectious diseases. The purpose of this experiment was to determine the effectiveness of different antibacterial hand cleaners (soap, alcohol hand sanitizer and ethanol soaked wipes) on killing bacteria. Hands were sampled without cleaning with antibacterial hand cleaner (control), and after cleaning with antibacterial soap, alcohol sanitizer, and ethanol soaked wipes. Samples were taken with a sterile cotton swab and inoculated on agar plates. Each experiment was done three times. Colonies were counted, mean values and standard deviation were calculated, and data was reported. Alcohol and sanitizer and ethanol soaked ...

Optimized Portfolio

About the report
The report is commissioned to construct a 3-asset optimal portfolio. Important to note, optimal portfolio is the one that offers highest risk-adjusted return to the investors amongst all the other portfolios available. For the purpose of this report, we have selected three different stocks, namely. Apple Inc, Bio Tech Holdings and Novavax. It is considerable that these three stocks were not just random pics but were selected as part of the diversification strategy.
According to the diversification rule, ‘’When an investor diversifies his holding across assets that are less than perfectly correlated, the weighted average risk ...

Problem #1

Plot the histogram of the number of cases of accident for each group of street speed, km/h.
These histograms describe the distribution of the number of cases of accident that have happened at the speed of 40, 60, 80 and 100 km/h. The distribution of the accidents at the speed of 40 km/h and 60 km/h is right skewed. The distribution of accidents at the 80 km/h speed is almost symmetric and the distribution of accidents at 100 km/h is uniform.

Problem #2

The average number of accidents at the speed of 40 km/h is 3.1 with a standard deviation of ...

Sales Comparison

Let us calculate how much sales in dollars made each of the salespersons during 6 weeks.
Total A = week1 + week2+week3+week4+week5+week6 = 1774+1808+1890+1932+1855+1726=10985

All other calculations can be seen in graph Total of the Table1.

Central Tendency
Mean for week 1 = Total 1 /4 = 1678
Mean for week 2 = Total 2/4 = 1569,25
Mean for week 3 = Total 3/ 4= 1819,25
Mean for week 4 = Total 4/4= 1701,25
Mean for week 5 = Total 5/4 = 1701
Mean for week 6 = Total 6/4 = 1575,25
Median for week 1 =1330, 1402, 1774, 2205 = (1402+1774)/2 = 1588
Median for week 2 = 1295,1507,1665, ...

Introduction

Receiving education is a costly choice. There are costs to education in terms of direct monetary payments and an opportunity costs. The choice to go to school means forgoing waged employment. Therefore, there is an opportunity costs of the wages that would have been earned. Therefore, there is a need to compare the returns versus the cost of education to make optimal decisions. Estimating the returns to education for any population segment is useful in making decisions on the optimal schooling level at both a personal as well as societal level. From a policy standpoint, estimating returns to education ...

Introduction

In this assignment, we will discuss and describe the application of statistics and probability theory to a real world problem. Our task is to evaluate and summarize the performance of a given stock (y). This report consists of the four parts. The first part is descriptive statistics of the given data between the two time periods and between the given stock and the Standard & Poor’s 500 index. Next, a hypothesis test will be performed in order to examine the performance of stock (y). The third part of the report includes Capital Asset Pricing Model estimation by the mean ...

Introduction

Spectrophotometry is one of the most common and efficient means of chemical analysis currently used in estimating the concentration of some chemicals. The technique exploits the radiation absorption property of various chemical substances in determining their concentrations. Spectrophotometry is based on Beer-Lambert Law. Beer-Lambert Law is the linear relationship between the absorbance and concentration of an absorbing species (Nair, 2010; Burrows et al., 2013). The mathematical expression of Beer-Lambert Law is shown in equation1 below:
A=aλ*b*c Equation 1
In the equation 1 shown above, A represents the measured absorbance, a is the absorptivity coefficient which depends on ...

Abstract

This study intended to examine the relationship between sleep, mood, and anxiety. In particular, this study sought to find out if depression symptoms are negatively correlated with sleep disturbance. The study involved 231 University students who filled a PSQI and DASS questionnaire which was statistically analyzed using Pearson correlation. The results of the study showed that only 12% had a good sleep during the study. More respondent who reported sleep disturbance also were found to be depressed. The results show that there exists a relationship between sleep disturbance, anxiety, and depression. The study showed that sleep disturbance coexists with ...

Business Analytics

Executive Summary
This study sought to assess whether customers who bought the African adventure will be willing to provide feedback. The study revealed that there more customers who are unwilling to provide feedback compared to those who are willing to provide feedback. A regression analysis was used to determine the factors that influence WOM intentions. WOM intentions were modelled as a function of age, income, trust and attitude. The analysis revealed that the demographic characteristics (age and income) do not influence WOM intentions. However, trust and attitude influence WOM intention. The paper recommends that smart marketing and advertising should ...

The Theme park is facing a problem of determining the limits of the height that would include at least 90% of the children that attend the theme park. To solve this problem the theme park can apply the central limit theorem to establish the height limits for each age group. The central limit theorem states that the mean for a sufficiently large population will be normally distributed (Curwin & Slater, 2008). Therefore, given the standard deviation and the mean of each set, the theme park can construct confidence intervals for each group. To ensure at least 90% of the children ...

Introduction

Health insurance coverage is a sensitive issue in the USA. A case in point is the recently enacted Obamacare in the USA. The law intended to widen coverage of health insurance to all American citizens including the vulnerable groups that are often disadvantaged in market-driven health insurance schemes. The reason that is always given for government provision of health insurance and health services is that the very poor cannot afford to pay market premiums for health insurance since they can barely meet their basic needs. Therefore, there is a need to subsidize health insurances and costs to those groups.
...

Abstract

In the experiment, the main objective was to compare the efficiency of two treatments in terms of Ajax and Hand sanitizer. The class was divided in two groups and Group A performed hand washing with Ajax while Group B used the hand sanitizer as hand washing agent. Cultures of the dominant hand by imprint method using Petri dish agar were done on each subject before and after the application of hand washing agents. The inoculated agar Petri dishes were incubated for a week at 37°C. Colony counts of the organisms identified were made. The mean change in the number ...

Abstract

The purpose of our experiment was to visualize the effect of light intensity on oxygen production. In the capacity of a test subject we used algal cultures. For these researches we used the Winkler method of titration. Our experiment results showed that there is an effect of light intensity on oxygen production. Our research has a great significance for agriculture, biochemistry and biophysics.

Introduction

Photosynthesis is the metabolic process by which plants trap solar energy, convert it to chemical energy, and store it in the bonds of organic nutrient molecules, such as glucose. Nearly all types of plants and algae, as well ...