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A circus clown at the top of a 60-foot platform is playing catch with another clown on the ground. The clown on the platform drops a ball at the same time as the one on the ground tosses a ball upward at 80 ft/sec. For what length of time is the distance between the balls less than or equal to 10 feet? Hint: the initial velocity of a ball that is dropped is 0 ft/sec. The formula for the height S in feet above the earth at a time t seconds for an object projected into the air with an initial velocity of v ft/sec from an initial height of s0 is: S = -16t2 + vt + s0
Name six virtues and characteristics of problems and hypothesis. Name some tips for identifying and developing formal research problems.
The resistances of carbon resistors of 1500 ohm nominal value are normally distributed with µ = 1500 and standard deviation = 200. What proportion of resistors is expected to have resistance greater than 1150 ohm?
Provide an overview of the problem you identified. What are some research components that could be measured in order to address the research question or hypothesis you identified? How might a researcher obtain that information?
Drug testing of job applicants - In 1990, 5.8% of job applicants who were tested for drugs failed the test. At the 0.01 significance level, test the claim that the failure rate is now lower if a simple random sample of 1520 current job applicants ..
A professor is targeting a score of 80 on an exam. His forty-nine students averaged 78 on an exam with s = 7. Are the scores significantly less than 80 at a significance level of 0.05? Show your work and state the conclusion.
Give an example of how you may use multiple regression to answer a question related to the impact of leadership change on employee attitudes scores, teambuilding training and performance outcomes.
Suppose a researcher has trained observers to rank participants according to their level of frustration when trying to solve a puzzle.
A bank wants to get new customers for their credit card. They try two different approaches in their marketing campaign. The first promises a "cash back" reward; the second promises low interest rates. A sample of 500 people are mailed the first br..
A fast food chain restaurant chain claims that lunch will be served within nine minutes of placing your order, or it is free. A sample of eight customers revealed the following waiting times in minutes:
You have been asked to help plan a data collection process to answer the two problem areas. Briefly outline a plan to: Collect qualitative data about how the current services are delivered
Construct the sampling distribution of the mean for the random samples of size 2 from the population. Calculate the mean and the standard deviation of the sampling distribution.
What is dispersion? Briefly name five measures of dispersion. Describe the characteristics of the standard deviation. Explain
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