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A researcher believes exercise reduces anxiety in women. She identifies a group of women who had not exercised before but are now planning to begin exercising. She gives them a 50-item anxiety inventory before they begin exercising and administers it again after 6 months of exercising. The anxiety inventory is measured on an interval scale and higher numbers indicate higher anxiety. In addition, scores on the inventory are normally distributed. The scores appear below.
Before After 46, 44 41, 40 42, 39 47, 46 43, 42 45, 43
a) What statistical test should be used to analyze these data? b) Identify Ho and Ha for this study. c) Conduct the appropriate analysis. d) Should Ho be rejected? What should the researcher conclude? e) If significant, compute the effect size and interpret this.
Compute the mean & the standard deviation of the total amount that this investor in 1 year from these four investments.
The board of a pharmaceutical company has nine members. One board member will be selected as vice president of marketing, and a different board member will be selected as vice president of research
The prong of a tuning fork moves back and forth when it is set into vibration. The distance the prong moves between its extreme positions is 2.22 mm.
Calculation of Probability - Normal Distribution - find the probability that a randomly selected employee
For an electric circuit, let V=cos 2pi(t) model the electromotive force in volts at t seconds. Find smallest positive value of t where 0
Let f be continuous on the closed interval [a,b] and differentiable on the open interval (a,b). Also, suppose that f(a) = f(b) and that c is a real number in the interval such that f'(c) = 0.
Probability and computing the odds. Compute the odds of each of the following events and rank them in order of decreasing likelihood.
Define a Markov chain with r+1 classes and find its transition probability matrix.
Who is the Hermite interpolation technique named after? Describe at least three of his contributions to the field of mathematics. Use at least one source in addition to your textbook with an appropriate citation and reference. (Do not use Wikipedi..
Tom and Jim decided to play the following game for points. A single die is rolled. If it shows a non-prime number, Tom receives points equal to two times the number of dots showing
Decide whether or not the events are mutually exclusive: Having good reading skills and having good math skills.
Is this test will be given to 600 randomly selected people, where each person has the illness, find the probability that there will be at least one false negative.
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