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1.In a study of caffeine and stress, college students indicate how many cups of coffee they drink per day and their stress level on a scale of 1-10. The data appear below: Number of Cups of Coffee Stress Level 3 5 2 3 4 3 6 9 5 4 1 2 7 10 3 5 = 3.88 = 5.13 s = 2.03 s = 2.90 2.Determine the regression equation for predicting stress level from the amount of coffee per day one consumes. 3.Predict the stress level for someone who drinks 8 cups of coffee a day.
The sample mean and the standard deviation were determined to be 120 and 40 respectively. The standard error of the mean is?
A report by the NCAA states that 57.6% of football injuries occur during practices. A head trainer claims that this is too high for his conference, so he randomly selects 36 injuries and finds that 17 occurred during practices. Is his claim correc..
Botanist is testing three plants and finds that prob of plant A being alive in a weak is 0.3 plant B is 0.6 and plant C 0.5 these probability are indipendant of each other. Determine the probability of all plants being alive after a weak.
Assume that each shipment contains a random sample of bearings. a. What is the probability that a given shipment is acceptable?
Choo Choo Paper Company makes various paper products. One of their products is a 30 mils thick paper. In order to ensure that the thickness of the paper meets the 30 mils specification
1. let x be normally distributed random variable with mu 100 and sigma 10. find the probability that x is between 75
The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 10%. What is the probability that 4 or more of the calculators will be defective?
A certain airplane has 2 independent alternators to provide electrical power. The probability that a given alternator will fail on a 1 hour flight is 0.02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the othe..
Let x be a random variable that represents a braking distance. Find the probability that a randomly selected braking distance is less than 49 meters.
USA today conducted a survey asking readers, "What is the most hilarious thing that has ever happened to you en route to or during a business trip? What kind of sampling method is this?
Suppose that population has normal distribution. Determine a 95 percent confidence interval for population standard deviation sigma.
Make an Excel line graph of the data on computer viruses. Discuss the underlying causes that might explain the trend or pattern.
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