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Mark buys two contracts at $557.50 (Australian dollar). On the delivery date of the contrasts, the price increased to $560.50. How much money did Mark make? What was his return on invested capital, given that the initial margin was 12.50%?
The mother of a teenager has heard a claim that 25% of teenagers who drive and use a cell phone reported texting while driving.
a. Using the 0.10 level of significance, is there evidence that the population mean is above $565?
the scores on an economics examination are normally distributed with a mean of 74 and a standard deviation of 16. if
A box contains three marbles - one red, one green, and one blue. Consider an experiment that consists of taking one marble from the box, then replacing it in the box and drawing a second marble from the box.
We recalculated our comparison of ideal number of children, this time only for women, separating them into two groups, those who indicated that they were "very happy" or "not at all happy" with life.
The probability of error in the transmission of a binary digit over a communication [2] channel is 1=103. Write an expression for the exact probability of more than 3 errors when transmitting a block of 103 bits. What is its approximate value? Ass..
Conduct a one-tailed hypothesis test given the information below. A certain brand of Green Energy light bulbs was advertised as having an average illumination life-span of 2,500 hours. A random sample of 50 bulbs burned out with a mean life-span o..
In a recent study of 86 working adults, the mean number of hours per week spent talking on the phone was 21.6. The sd= 5.7 hours.
question 1aa statistics practitioner wants to test the following hypothesesho p.70h1 pgt .70a random sample of 100
the value of the linear correlation coefficient is reported by an investigator to be 0.55. based on this statistic we
Perform a statistical test for the hypothesis and write a short conclusion. Describe a prediction problem related to the data
Is this a probability sample or a nonprobability sample? What specific type of probability or nonprobability sample does this procedure represent?
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