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...

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Descriptive analysis in excel has been used to come up with relevant figures of the given data samples which is tabulated below:
Descriptive Statistics | Current | Proposed |
Mean | 75.06557 | 75.42623 |
Standard Error | 0.505094 | 0.32091 |
Median | 76 | 76 |
Mode |...

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How can graphics and/or statistics be used to misrepresent data? Where have you seen this done?
Answer:
It is a well known fact that statistics can be misleading. They are often used to prove a point and an easily be twisted in favor of that point. Statistics, graphics and database are used in medical field to approve, prove or disapprove theories, analysis and interpretation of ailments, medications and its impact and treatment and its...

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Range 3.5
Minimum 1.5
Maximum 5
Sum 206
Count 49
Confidence Level(95.0%) 0.196039006
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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 | |...

...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...

...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...

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University of Phoenix
RES/341 Research and Evaluation I
Descriptive Statistics: Real Estate
Does having a pool increase the price of houses that have the same number of bedroom? In order to answer that question, we divided our data set into two groups; houses with 1 to 3 bedrooms and houses with 4 and more bedrooms. We then compared the prices of houses with a pool to houses without a pool in each group. Different...

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