F1.Any time there is a statistical association between events, we can assume there is causation.

T2.A binary variable is categorical data that can take only two values; for example: college grad = 1, not college grad = 0.

T3.Likert scales measure ordinal data with coding; the more scale points used, the coarser the scale.

T4.Characteristics of a population are called parameters; characteristics of a sample are called statistics.

T5.Of the seven sampling methods, only cluster sampling uses geographical areas as strata.

Problem section. Show all your work and uses only your own words (not words from the textbook)

A. Using the data below, create a scatter plot with EXCEL. Describe the relationship between the two variables (Unit Price and Units Sold) using the Figures on pp. 84-85. Unit Price: 5, 4, 6, 5.5, 6.25, 7

Units sold: 17, 16, 13, 17, 12, 10

B. What are the advantages and disadvantage of convenience sampling?

Advantages:
• It’s fast and quick
• It costs less because the samples can be used from anywhere that is accessible to the person conducting the research.

Disadvantages:
• Results are biased since there is a lack of representative people in the study. • Results may not be replicable when repeated

C. What is “skewness”? Will a right-skewed distribution have most of the values clustered on the right? Explain your answer!

In a histogram skewness is characterized by the direction of its longer tail, and if both tails are the same, it is considered symmetric. No, a right-skewed distribution has most of its values clustered on the left, hence why it is positively skewed. As our text book illustrates, right-skewed histograms are used by business data where it is often bounded by zero on the left but unbounded on the right.

D. What is a histogram and how do you decide how many bins...

...916441174
Range 3.5
Minimum 1.5
Maximum 5
Sum 206
Count 49
Confidence Level(95.0%) 0.196039006
In both the Charismatic and the punitive condition data sets there were 49 people surveyed. We know this because we were able to use descriptive statistics to show the count and that shows the number of people surveyed. The average or the mean of the charismatic condition is 4.20. The standard error is saying that 0.0975 % is the error that will normally occur if two...

...Data Analysis: Analyzing Data - Inferential Statistics
Inferential statistics deal with drawing conclusions and, in some cases, making predictions about the properties of a population based on information obtained from a sample. While descriptive statistics provide information about the central tendency, dispersion, skew, and kurtosis of data, inferential statistics allow making broader statements about the relationships between data....

...Statistics Cheat Sheet
Proportion = Frequency x 100 = Percentage Total No | Z score (standardised value)-how many sds from the mean the value liesZ score = data value – mean Standard deviation | Metric Data = ExploreCategory = Frequencies |
Bigger sample size will give a narrower confidence interval range (more specific) outliers affect the mean but not the median – this is why the median is preferred here.mean | |...

...Q1. (a) ‘Statistics is the backbone of decision-making’. Comment.
Ans.(a) Due to advanced communication network, rapid changes in consumer behavior, varied expectations of variety of consumers and new market openings, modern managers have a difficult task of making quick and appropriate decisions. Therefore, there is a need for them to depend more upon quantitative techniques like mathematical models, statistics, operations research and econometrics.
Decision...

...analysis of the data was started by doing descriptive statistics for the data as shown below.
Table 2: Showing the descriptive statistics for the brick and tile data.
Variable N N* Mean SE Mean StDev Minimum Q1 Median Q3 Maximum
Tile 16 0 412 127 508 56 124 227 390 2017
Brick 12 0 1075 417 1443 121 328 550 1453 5218
The purpose of the descriptive statistics is to...

...Research and Statistics in Health Sciences
As health care evolves in our nation, the role of research and statistics will evolve right along with it. There will be more research into medical care, health care costs, medications, and types of treatments. The most common types of statistics reported will be the fertility rates, which includes vital statistics (birth, death, marriage, divorce rates), morbidity (the incidence of...

...Descriptive Statistics Paper
By
September 27, 2010
In this paper Team B will examine the data that we have collected and we will draw a conclusion based on your findings, to get to the conclusion we will analyze the data using descriptive statistics, we will calculate the measures of central tendency, and dispersion, we will also show all the information with graphics and tables for a better understanding of the date, after all these steps are executed we...

...Descriptive Statistics using Excel
May 2011 / Dr Rensvold
Open the Excel spreadsheet labeled "Example Database." The first page is the Data Dictionary. The
Variable Label is the "handle" used for computation. The Variable Name is longer and more descriptive.
The Values column shows the numerical values associated with categorical variables. In the data
dictionary, you can see that the only categorical (nominal) variable is SEX. The others are ratio variables
(why?)...

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