## CHECK THESE SAMPLES OF Statistical Methods

...: this is similar to double sampling; but is continued – if required – for a pre – decided number of times. The OC curve is the ideal curve, were all units tested. Based on the requirements of quality, the OC curve can be used to decide the type of sampling plan, the proportion of the sample that would optimally represent the lot, and the extent of risk that is being taken. Rather than have arbitrary decisions, basing these calculations on the OC curve helps in identifying the **methods** of sampling that would do both, the production lot and the requirements of quality the maximum justice. References: Morien, D. (2007) Business **Statistics**. NY: Thomson Learning Nelson Downing, D., Clark, J. (1997)....

8 Pages(2000 words)Assignment

...1. The 95% confidence interval for the unknown mean from a Normal distribution is given by 96 where is the sample mean, is the population standard deviation and n is the sample size. Here 1.96 is the value of the standard normal curve such that P (Z 1.96) = 0.025. The confidence interval is the result from the test **statistic** N (0, 1).
Here = 96.4, n = 25 and = 14.
Hence the 95%confidence interval is 96.4 1.96(14/)
96.4 5.488
(90.912, 101.888)
To test for the hypothesis H0: = 100 Vs H1: 100 using this confidence interval.
Since the 95% confidence interval contains the value 100, we have insufficient evidence to reject H0 at 5% significance level. Hence we can conclude that the population mean is = 100.
2... . As the...

8 Pages(2000 words)Math Problem

...are to be:
(1) More cross - cultural tolerant and empathetic, and
(2) More self - confident and independent
As what can be observed from the design formulated form the study, we can clearly and able to see the changes or improvements made by the subject students so we can say that it is an appropriate design. A very systematic approach to the study and almost no subjectivity involved.
At the beginning, those who conduct the study, of course, hypothesized that the program gives some significant positive effect on the students, but in conforming with technicality of using **statistics** to assess the subject to see any progress made, they just gave a hypothesis that no improvement will undertake. In...

2 Pages(500 words)Essay

...Two **Statistical** **Methods** 0 Introduction **Statistical** **methods** have evolved over a period to time to address specific needs of industries, governments and society at large. **Statistical** studies follow either the experimental or the observational path. Whatever be the approach or study that is taken up, the analysis of the data is done using any of the number of **statistical** **methods** that are available. Each one of them is used to reach specific targets. For our current consideration, we have taken up, the chi-square distribution and the Analysis of Variance (ANOVA)1.
2.0 The chi-square Distribution
A chi-square distribution...

2 Pages(500 words)Essay

...Question 39.3 22.5 37.6 26.7 23.8 29.4 28.7 30.8 28.7 22.6 sample mean 29.01 standard deviation 5.8 hypothesized mean 30 95% confidence level 1.96
99% confidence level 2.58
p = Pr {X < 29.01 or X > 30.99}
Pr {Z > 0.5398} = 0.2946
Pr {Z < - 0.5398} = 0.2946
Pr {- 0.5398 < Z < 0.5398} = 0.4108
p = 2*0.2946 = 1 - 0.4108 = 0.5892
Interpretation:
The p-value of 0.5892 is relatively high and therefore we do not reject the null hypothesis.
The sample data is sufficiently consistent with =30.
There is no **statistical** significance in the difference between the sample mean and the hypothesized mean.
Question 2
sample mean 29.01
sample standard deviation 5.77
hypothesized mean 30
95%...

4 Pages(1000 words)Research Paper

...Article Review Synopsis Article: **Statistical** **Methods** in Psychology Journals: Guidelines and Explanations. Published in American Psychologist. Vol. 54, No. 8, 594–604 Written by Leland
Wilkinson.
The article takes the ongoing dispute over the applications of significance testing in psychology journals into consideration. The article was motivated greatly by the publication of Cohens (1994) article, the Board of Scientific Affairs (BSA) of the American Psychological Association (APA) convened a committee called the Task Force on **Statistical** Inference (TFSI) whose charge was "to elucidate some of the controversial issues surrounding applications of **statistics** including...

5 Pages(1250 words)Essay

...of the **Statistical** Quantities made and calculate these quantities.
Answer
The measure of average I would suggest is the mode. This is because mode will give the exact time it takes to access the site.
Class
X
Frequency(f)
Cf (cumulative frequency)
0-15
7.5
17
17
15-20
17.5
24
41
20-25
22.5
19
60
25-30
27.5
28
88
30-35
32.5
19
107
35-40
37.5
13
120
Mode =
Where
l = lower class limit of the modal class
h = class width/size
f1= frequency of the modal class
f0=frequency of the class preceding the modal class
f2=frequency of the class succeeding the modal class
=
=
= 30 seconds.
ii. Interpret these, and any other...

4 Pages(1000 words)Essay

...Doctoral **statistical** **methods** Task Doctoral **Statistical** **Methods** **Statistical** **methods** analyze the characteristics of a population in response to a sample phenomenon. Inferences are prepared from observations of the representative samples. ‘Analytical and computational’ techniques assess the characteristics and sequence of the components on analysis (Chiang 2003). Therefore, analyzing the prenatal experiences of a child requires ‘qualitative and quantitative’ methodologies. Qualitative assessment is employed because the factors under observation are not measurable since the study focuses on assessment of responses in relation to sound....

1 Pages(250 words)Essay

...Chapter 7 Questions. Exercises 4. An industrial psychologist obtains scores on a job-selection test from 41 men and 31 women with the following results: Men M= 48.75 (SD =9.0); Women M = 46.07 (SD = 10.0). Test the difference for the significance at both the .05 and .01 levels (two-tailed). Determine the effect size for the difference of these two sample means. Does this effect size seem to be large or small?
10. Suppose that you have read the following sentence in a psychology journal: “The experimental group obtained a higher score on the recall task (M= 14.7) than did the control group (M=11.1), and this difference was **statistically** significant, t (38) =2.3, p < .05.” Assuming the two samples are the same size: (a)...

3 Pages(750 words)Assignment

...**Statistical** **Methods** in economics **Statistical** **Methods** in Economics How long are bicycles hired for (on average) onthe Santander London Bicycle Hire scheme?
With the increasing heavy traffic and the ever increasing economy of London, there is need to find an alternative **method** to ease the heavy traffic witnessed in London. In fact according to Godwin (2004) the leading cause of traffic congestion is because the roads are full and close to the maximum capacity. In connection to this, a few years ago Santander Bicycle scheme was introduced by London so as to give people opportunity to hire bicycles from various docking stations in London. This was also intended to improve people’s fitness and reduce traffic congestion within the city... . The...

4 Pages(1000 words)Coursework