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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.
For which of the following situations is it appropriate to use a scatter diagram or scatter plot?
The analysis of variances produces df between = 3 and df within = 24. For this analysis, determine df total ?
Using this information, calculate Blpha risk (probability of Type II error) if the true population mean really is 81.
Records also point to that interviewing committee of bank officers approves 85% of individuals they interview. Determine probability that Ann's loan request is approved.
The Pearson Product-Moment Correlation Coefficient (r) is a measure of linear relationship between two variables.
In a study designed to test the effectiveness of acupuncture for treating migraine, 142 subjects were treated with acupuncture and 80 subjects were given a sham treatment. The numbers of migraine attacks for the acupuncture treatment group had a m..
Then estimate demand again with a weighted moving average in which sales in the most recent year are given a weight of 2 and sales in the other two years are each given a weight of 1.
What is an interaction? Describe an example and identify the variables within your population (work, social, academic, etc.) for which you might expect interactions?
Determine: SS(xy)Linear correlation coefficient, r. Bar graph below compares mean time in seconds for 7-yr old girls to complete certain task.
What is the value of the sample test statistic? (Test the difference p1 - p2. Do not use rounded values. Round your final answer to two decimal places.)
Key Refining decided to send a special financing plan to charge account customers having the highest 10 percent of the money charges. What is the dividing point between customers who receive the special plan and those who do not.
Following data represent random sample of bank balances for population of checking account customers at large eastern bank. Based on data, determine the 95 percent confidence interval estimate for true population mean?
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