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Probability of simple and compound events. A private college report contains these statistics:
70 percent of incoming freshmen attended public schools.
75 percent of public school students who enrol as freshmen eventually graduate.
90 percent of other freshmen eventually graduate.
a) IS there any evidence that a freshman's chances to graduate may depend upon what kind of high school the student attended? Describe.
b) What percent of freshmen eventually graduate?
Using the data file below, construct a histogram and a frequency polygon. Describe the shape of this distribution.
One approach would be to contact every psychology graduate student you know and ask them to fill out a questionnaire about it.
Compare 2 moving averages using MSE and compute Exponential smoothing. The subsiquent data which represents demand for company ABC's products for the last 10 months.
What is the arithmetic mean selling price?
The main goal of correlation research is ______________
Suppose there is no cyclical component. Quarterly billing for water usage is shown below describe summer billing for year 5.
Z score on comparison distribution for sample score and your conclusion. Suppose that all population are normally distributed.
Compute lower and upper quartiles of log10-balances? Determine 95% range of the balances in $s? Express in English what the two boundaries mean.
Employees of a local university have been classified according to gender and job type. The following table provides data about the employees.
The researcher found that Lincoln's educational score did not correlate with the expected variables.
Determine the average score for ERAU graduates? Determine the value of test statistic? Significance level?
Is there evidence of a significant difference in the proportion who get their news primarily from newspapers between those 36 to 50 years old and those above 50 years old? (use α = 0.05)
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