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The real-world situation or problem you selected to address, the independent and dependent variables you would study and the number of levels of the independent variable, the statistical null and alternative hypotheses, a description of what information the effect size would tell you that the...
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1. For the following exercise, complete the following: a. Find the mean, median, and range for each of the two data sets. b. Find the standard deviation using the rule of thumb for each of the data sets. c. Compare the two sets and describe what you discover. The following data...
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I can increase it to 12AM Eastern Standard Time if needed.
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The drying time of one particular paint is approximately naormally distributed with a mean of 45 minutes. it is also known that 15% of walls painted with this paint need more than 55 minutes to dry completely. Find the standard deviation of this distribution.
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(a) Make an Excel line graph of the data on computer viruses. (b) Discuss the underlying causes that might explain the trend or pattern. (c) Fit three trends (linear, exponential, quadratic). (d) Which trend model is best, and why? If none is satisfactory, explain. (e) Make a forecast for...
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The number of magazine subscriptions per house hold is represented by the following probability distribution. Magazine subscriptions per house hold - 0, 1,2,3,4 Probability - .48, .35, .08, .05, .04 a) Calculate the mean number of Magazine subscriptions per house hold. b) Find the standard...
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use random variables to calculate the probability that the mean height of the girls is greater than the mean height of the boys
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Suppose a organization takes a random sample of 1000 voters and ask them whether they approve of the job performance of the president. What sampling distribution is related to thin process.
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Does it appear that the weight of an alligator is predictable from its length?
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By mistake, a manufacturer of CD minirack system includes 3 defective systems in a shipment of 10 going out to a small retailer. The retailer has decided to accept the shipment of CD systems only if none is found to be defective. Upon receipt of the shipment, the retailer examined only 5 of the...
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- 1. A school administrator wonders if students whose first language is not English score differently on the math portion of the sat exam than students whose first language is English. The mean SAT math score of students whose first language is english is 516 on the basis of data obtained from the college board. A simple random sample of 20 students whose first language is not English result in a sample mean SAT math score of 522. SAT math score are normally distributed with a population standard deviation of 114. Why is it necessary for SAT math scores to be normally distributed to test the hypothesis?
- 2. What are the steps espoused by Applied Statistics in Business and Economics for formal hypothesis testing? Why is the sequence important?
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