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Tony invested $380,000 in a new business 7 years ago. The business was expected to bring in $6,000 each month for the next 26 years (in excess of all costs). The annual cost of capital (or interest rate) for this type of business was 8% with monthly compounding. What is the value of the business today?
As you would expect, there are always some suppliers that do not meet this goal. Determine what percent of suppliers have lead times between 115 and 140 days.
Give an example of two variables that probably have a significant linear correlation coefficient, but one variable does not necessarily cause the other.
The managers of a brokerage firm are interested in finding out if the number of clients a broker brings into the firm affects the sales generated by the broker.
Assume that a study of 500 randomly selected school bus routes showed that 480 arrived on time. Is it "significant" for a school bus to arrive late?
Find the evaluation score confidence intervals for the following two departments: Department 1 and Department 4 combined. Find the confidence interval at the 95% level. Use s = 6.06 and the mean 17.625.
Researchers found average heart rates were significantly less on the minitrampoline than for the treadmill and stationary jogging. Does this information represent descriptive statistics or inferential statistics? Why?
Calculate the Measures of Center and Measures of Variation for the following data set representing the chest size of 20 bears in inches.
1. How does the denominator of the F-ratio (the error term) differ for a repeated-measures ANOVA com- pared to an independent-measures ANOVA?
ANOVA is a powerful statistical test. How does ANOVA differ from other parametric tests? What are the conditions that must be met to use a one-way ANOVA?
A researcher was interested in the effects of weather on cognitive performance.- Using these data, conduct a test to see whether performance differed on sunny and cloudy days.
Construct 90% and 95% confidence intervals for the population proportion. Interpret the results and compare the widths of the confidence intervals. If convenient, use technology to construct the confidence intervals.
Are the personal characteristics of members of congress an important consideration when it comes to their election?
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