Table 1-2 -Refer to Table 1-2.The Table Above Shows the Sales of Shows

question 1

Essay

Table 1-2

-Refer to Table 1-2.The table above shows the sales of DVD recorders in North America.Present the information using a bar graph.

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Definitions:

Normal Approximation

A method used to approximate the distribution of a sum of independent random variables using the normal distribution, under certain conditions.

Continuity Correction

An adjustment made when approximating a discrete distribution with a continuous one, particularly relevant when making inferences about binomial distribution using normal approximation.

Null Hypothesis

A statement in statistics that suggests there is no significant difference or relationship between specified populations, any observed difference being due to sampling or experimental error.

Wilcoxon Signed Rank Test

A non-parametric statistical test used to compare two related samples to determine if their population mean ranks differ.