A Random Sample of 60 Students in the Business Statistics

question 131

Essay

A random sample of 60 students in the business statistics course answered a survey on the average number of hours they spent on statistics each week.Unfortunately,the original data were lost and all that remains is the frequency table below.From these data,calculate the estimated sample mean.
$\begin{array} { c c r } \text { Class } & \text { Hrs } & \mathrm { N } \\1 & 0 - 3 & 18 \\2 & 4 - 7 & 16 \\3 & 8 - 11 & 14 \\4 & 12 - 15 & 10 \\5 & 16 - 19 & 2\end{array}$

Interpret the results of t-tests and Z-tests in terms of statistical significance.

Recognize the use and limitations of SPSS software in statistical testing.

Understand the practical implication of effect sizes in research interpretation.

Understand the concept and utility of effect size in research studies.

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Definitions:

Income Statement

A financial statement that reports a company's financial performance over a specific accounting period, detailing revenues, expenses, and net profit or loss.