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Which value of r indicates a stronger correlation: r=0.793 or r equals=-0.854? Explain your reasoning.
Decide how many of each of the following products your company should produce. The labor needed to produce product 1 is 4 hours, product 2 requires 9 hours of labor. Product 1 and product 2 both require 1 hour of inspection time before shipping. The ..
In a survey to determine child care costs for working parents, the local Chamber of Commerce randomly samples licensed child care centers in four regions of the metropolitan area. The purpose of the survey is to see whether and how average child c..
it lsquos has been claimed that if you drop a standard thumbtack from a height of 3 feet or more onto a flat hard
EIHP Assessment 2 – Interpreting Basic Statistical Data, Article: Ramirez, G. & Beilock, S.L. (2011). Writing about testing worries boosts exam performance in the classroom. Science, 331. 211-213. This article is page 74-77 of your handbook.
2. The producers of a new toothpaste claim that it prevents more cavities than other brands of toothpaste. A random sample of 60 people used the new toothpaste for 6 months. The mean number of cavities at their next checkup is 1.5. In the ge..
1. In an extensive study involving thousands of British children, Arden and Plomin (2006) found significantly higher variance in the intelligence scores for males than for females. Following are hypothetical data, similar to the res..
The program office budgets $30,000 per program review at the contractor's site. Your concern for "end of year" spending drills is that you have budgeted enough for the reviews (i.e. you are only concerned if the actual costs are higher than the..
The average weekly earnings of the plumbers in a city is [Mu=$750] with a standard deviation of [s=$40]. Assume that we select a random sample of [n=64 plumbers], what is the probability that the sample mean [x] will be greater than $740 or greater ..
The access code for a car's security system consists of Five digits. The first digit cannot be zero and the last digit must be odd. How many different codes are available?
An analysis of the final test scores in this class shows that the scores follow the normal distribution. The mean of the distribution is 75, and the standard deviation is 8. The professor wants to award an A to a student whose score is in the highest..
Define a correlation coefficient
Annual salary plus bonus data for chief executive officers are presented in the Business-Week Annual Pay Survey.
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