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Scores upon the SAT college entrance test in current year were roughly Normal with mean 515 and standard deviation 114. You select an SRS of 100 students as well as average their SAT scores. If you
If high scores on one variable are associated with the high scores on second variable, and low scores on first variable are associated with the low scores on second variable), the class of correlati
When a parachute is inspected, the inspector is looking for anything that might indicate the parachute might not open.
Why is coefficient of variation important? What do we mean when we say the coefficient variation has no units/ What advantages can there be in having no units? why is relative size important?
In professional basketball games throughout 1980-1982, when Larry Bird of Boston Celtics shot a pair of free throws, 5 times he missed both, 251 times he made both, 34 times he made only the first,
A spaceship is approaching earth at relative speed of 0.65c. The mass of ship is 3.00 107 kg. Determine the magnitude of each of the following.
Assume one gallon of gasoline produces 1.1 108 J of energy, and this energy is sufficient to operate a specific car for 39 miles. An aspirin tablet has a mass of 340 mg. If the aspirin could be conv
After the launch, an observer upon earth sees the spacecraft approaching at a speed of 0.50c and exploration vehicle approaching at speed of 0.65c. Determine the speed of the exploration vehicle rel
Galaxy A is moving away from us with speed of 0.70c relative to earth. Galaxy B is moving away from us in opposite direction with a relative speed of 0.50c. Suppose that the earth and the galaxies a
A person upon earth notices rocket approaching from the right at speed of 0.77c and another rocket approaching from the left at 0.56c. Determine the relative speed between the two rockets, as measur
Take any location (n,k) in Pascal's triangle, and consider the six locations immediately surrounding (n, k). Label these locations alternately clockwise A and B. Prove that the product of the binomi
Find the 95% confidence interval for the standard deviation of the heights of maple trees if a sample of 23 trees has a standard deviation of 12 feet.
Let a sub n be the number of ways of coloring the sectors using four colors (Blue, Green, Red, Yellow) so that no two adjacent sectors have same color. Determine and solve a recursion formula for {a
In a sample of 45 mice, a biologist found that 46% were able to run a maze in 30 seconds or less. Find the 99% limit for the population proportion of mice who can run that maze in 30 seconds or less
Determine the maximum error of the estimate, E. Determine the confidence level used for the given confidence interval.
A study was conducted to determine the mean amount spent on birthday gifts for a typical family having two children. A sample of 145 was taken, and the mean amount spent was $187.75.
A 95% confidence interval estimate for population mean was computed to be (34.6, 49.4). Find out the mean of the sample, which was employed to find out the interval estimate (show all work).
By measuring the amount of time it takes component of product to move from one workstation to the next, an engineer has estimated that the standard deviation is 4.42 seconds.
Construct a 98% confidence interval for the difference between the mean height of super models and the mean height of women who are not supermodels.
Your goal is to pull out face card on the first draw and heart in the second draw. Now assume there is a roll of quarters with one special quarter to be the same as probability of a pulling out face
Describe the null and the alternate hypotheses. Ho: ___and Ha: ___ Describe the critical value(s) for this test. _____ Determine the test statistic. _____ Determine the p-value for this test. ____
Find the appropriate Confidence Interval for this problem. (______, ______). State your conclusion in the context of this problem.
Given an unlimited supply of M & M's and of bugglegum, which cost one cent each, and of sourballs, peppermints, and gumdrops, which cost two cents each. You are going to buy n cents worth of can
How many integers from 1000 to 9999, both ends included, have the property which every digit which appears in the number appears at least twice. So 1000 does not have the property, because the 1 app
A local bank claims that the waiting time for its customers to be served is the lowest in the area. A competitor bank checks the waiting times at both banks. The sample statistics are listed below.