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A high school principal wanted to know if the racial makeup of her teachers mirrored that of the student body. The student body broke down into 47% White, 28% Latino, 15% African American, and 10% other. Of the 65 teachers, 42 were White, 4 were Latino, 15 were African American, and 4 were Other. Do these results suggest that the racial makeup of the faculty members is different from that of the students? (Use the .05 significance level.)
Use the five steps of hypothesis testing and explain your findings.
Is there evidence to suggest a difference in the mean waiting times at the four body shops? Use the .05 significance level.
Determine the coefficient of correlation between the two variables. Interpret the value.
What is the probability that a particular driver has two speeding violations.
Suppose x follows a distribution with density function: f(x)=C*abs(x-2), 0 =
Determine if there is a linear correlation between annual income and the amount of insurance? What is the linear regression line for this data?
In study of a clinical for an allergy drug 115 of the 204 subjects reported experiencing important relief from their symptoms.
Iit is known that signal change in this brain area is normally distributed with mean of 35 and standard deviation of 10. By using .01 level, what must researcher conclude?
Find a 90% confidence interval for the population mean weight of all such turtles.
Students will conduct one brief research exercise that will be written up as a research report using APA style.
Is this enough evidence to support Union's position? Use significance level of a = 0.05. You may suppose the mean annual salaries are normally distributed.
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
Compute the within group variability. Do you require any post hoc testing? Why or why not? Decribe in detail.
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