## CHECK THESE SAMPLES OF Statistics: Population Distributions

...?**Statistical** Tests Introduction There is an ample amount of evidence in the literature that heart and body size are correlated3&15. It is believed that individuals with large body size will generally possess a larger heart as opposed to smaller individuals. The cardiovascular system functions by pumping blood to meet the metabolic requirements of the tissues. To fulfil these metabolic requirements it is suggested that the heart rate of smaller individuals should be greater than the heart rate of large people. This theory is based on the concept that a heart with small size will have smaller cardiac output as compared to the larger heart. Hence, this scientific theory proposes that the heart beat of the larger individual...

12 Pages(3000 words)Essay

...Due **Statistics** Report II This study analyzed the number of phone calls made home by a small sample (n=40) of undergraduate students. In this study, the number of phone calls made home was the dependent variable, and both the year of the student (freshmen, sophomore, junior, or senior) and the gender of the student were independent variables. Because this study has two independent variables and one dependent variable, a factorial ANOVA design is most appropriate. The gender factor has two levels: male and female, and the year factor has four levels (freshmen, sophomore, junior, or senior), meaning we have a 4x2 ANOVA design. Because we have a 4x2 ANOVA design, one interaction effect is possible (between the gender and...

2 Pages(500 words)Research Paper

...?Situation Imagine that you can predict the s scores on the Tests for Understanding in this In Week there was a bimodal **distribution**. In Week 2, there was a positive skew. In Week 3, there was a normal **distribution**. In Week 4, there was a negative skew. Questions: 1. What do these different scores tell you about the tests in Weeks 1, 2, 3, and 4? What is happening to the students' scores over time? From the given **distributions**, one can say that there is a distinct change in the pattern of student’s scores on understanding over the three weeks. Initially, there was a bimodal **distribution**, showing that students were grouped into those that understood better (scores that clustered around the top of the scale) and those that did... , and only...

2 Pages(500 words)Essay

... the frequency **distribution** table: Age Frequency 16-27 26 28-39 9 40-51 5 52-63 1 64-76 9 From this frequency table, we can see that the data are skewed to the right. If we were to graph this table, we would understand that the mass of **distribution** is concentrated more on the left-hand side. This is because there are relatively few high values, thus skewing the graph to the right. Because this graph would not contain a normal curve, we could predict a high number of people between the ages of 16 – 27 (26 out of a total of 50 — 26/50 = 0.52 or more than half).... there are 50 numbers, we can divide these numbers into groups of 10 (5 groups). Next we subtract the lowest number from the highest number (76 — 16 = 60). After this, we will divide...

1 Pages(250 words)Math Problem

...T-test and Degree of Freedom
What is the difference between z-test and t-test? Why is degree of freedom important for t-test? Why t-test is used most often than z-test?
A z-test is used to compare **population** mean with a standard or for comparing the means of two **populations** when the **population** standard deviation is known. It is also used for comparison of a proportion with a standard proportion or for comparing two proportions. A z-test can be also used if sample size is large (≥30). A t-test is used to compare **population** mean with a standard or for comparing the means of two **populations** when the **population** standard deviation is...

2 Pages(500 words)Assignment

...to the Bureau of Justice **Statistics** (BJS) 2011, there were about 1.5 million prisoners in both state and federal prisons. Of this **population**, 40% were above 40 years old. The drug related offenders accounted for close to half the **population** of inmates in federal courts. Besides, the persons aged between 20 to 44 years committed most crimes accounting for 78% of the prisons’ **population**. In the same report prepared by BJS, approximately 92% of the prisoners are males. On crimes, apart from drugs, robbery, murder, assault, and burglary are the most common crimes in US.
Although, the BJS 2011 **statistics** showed that the **population** of US...

6 Pages(1500 words)Assignment

...the said goal, imparting adequate training to its employees or to hire trained professionals to apply the system for the optimum benefit of the organisation becomes inevitable. With a view to select appropriate software to suit the requirements, Red Hat, Ubuntu and Novell’s SUSE based OS are being taken into consideration. Indeed the training motivates the employees as well as raises their confidence in using the software to meet the requirements.
RedHat: In terms of trained professionals and certified training program, Red hat tops other Linux **distributions**. RedHat training centers are spread across the globe and training programs on various specializations are available. They are also providing ‘on-site team...

9 Pages(2250 words)Essay

.... Variance comes out as 1059. Standard Deviation is found out by calculating the square root of variance. Standard deviation is obtained as 32.54. The calculations are shown in Table 2.
This implies that the **distribution** can be defined by the mean and standard deviation as (161.5 +/- 32.54).
References:
Anderson, David R., Sweeny Dennis J. & Williams, Thomas J. (2013). **Statistics** for Business & Economics. 12th ed.... From the data collected in Module a frequency **distribution** can be prepared as shown in Table Table Frequency **Distribution** Time (in Minutes) Frequency
81-100
1
101-120
3
121-140
0
141-160
3
161-180
8
181-200
3
201-220
2
Figure 1: Graph for Frequency **Distribution**
The...

2 Pages(500 words)Essay

...) for fast food service at two burger companies were recorded for quality assurance. Using the data below, find the following for each sample.
a. Range
b. Standard deviation
c. Variance
Lastly, compare the two sets of results.
Ans: The answer is given below in table:
Company
Wait times in seconds
Big Burger Company
105
67
78
120
175
115
120
59
The Cheesy Burger
133
124
200
79
101
147
118
125
10. What does it mean if a graph is normally **distributed**? What percent of values fall within 1, 2, and 3, standard deviations from the mean?
Ans: A graph is said to be normally **distributed** if it is symmetric and bell shaped with a single peak. For any normal **distribution** two quantities must be...

2 Pages(500 words)Assignment

...is normally **distributed**. 99.7 percent of all the values should fall within three standard deviations from the mean. In other words, they should fall between µ-3σ and µ+3σ (Berman, 2013).
µ + 3σ = 78.70
µ - 3σ = 22.9
More than 99.7% of the data fall within the range reflecting the fact that the data has a normal **distribution**. One of it implications is the fact that the estimates from the above data, both the measures of central tendency and the measures of variations are close to the true values of the **population** (Patel, 2009).
References
Berman, S. (2013). Mathematical **statistics**; an introduction based on the normal **distribution**. Scranton: Intext...

3 Pages(750 words)Assignment