Answers created by soq

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• How is p-value related to #alpha#?
  
• Which measure of central tendency is responsive to the number of scores below or above it but not to their exact values?
  
• Can you determine the correlation coefficient from the coefficient of determination?
  
• How do you interpret confidence intervals in statistics?
  
• What is the definition for zero correlation?
  
• What is the relationship between the standard error of the mean and the sample size?
  
• Question #0b2e4
  
• A correlation of 0.6 means that 60% of the points in the scatter plot lie above the regression line. Is it true or false?
  
• For all of the cars registered in state of colorado the correlation between their fuel efficiency (in miles per gallon) and their color would be positive. true or false?
  
• Is the "time in minutes students will need to complete a test" a discrete random variable? Why or why not?
  
• Show np>npq for binominal distribution?
  
• Is "The weights of the tackles in professional football teams." continuous or discrete? Why?
  
• Does the standard error of the mean show how close the sample mean is from the population mean?
  
• How can you describe the spread of a data set?
  
• Will a 95% confidence interval typically contain nearly all of the observations?
  
• If events are mutually exclusive are they independent?
  
• What is the effect on the mean, median, mode, IQR, and range of each data value is increased by 3?
  
• Question #efaa9
  
• Are disjoint events independent?
  
• How do you find the z score of a percentile?
  
• How can regression analysis be used in business?
  
• How does a t distribution differ from a normal curve?
  
• Question #8dea3
  
• What does "correlation vs causation" mean in statistics?
  
• How do you choose the level of significance when doing a hypothesis?
  
• What is the difference between variance and variability?
  
• What is a normal probability curve?
  
• Question #ab446
  
• What does a correlation coefficient of -1, 0, and 1 mean?
  
• A correlation coefficient will always have a value between what two values?
  
• How to do this MC?
  
• How do you calculate the p-value in a hypothesis test?
  
• What is the power of a statistical test?
  
• What can the chi-square goodness-of-fit test be used to test for?
  
• When would you reject the null hypothesis in a t-test?
  
• What is a type I error? Why does it occur?
  
• Why does the margin of error decrease as the sample size #n# increases?
  
• What is the relationship between a hypothesis and a theory?
  
• Question #456cf
  
• What's the difference between a binomial, hypergeometric, and Poisson probability distribution?
  
• How do you find the mean median and mode of a histogram?
  
• Suppose that a triangle has side lengths of 10, 11, and 17. Is the triangle as acute, obtuse, or right? How do you know? Explain.
  
• A consumer advocacy group claims that the mean mileage for the Carter Motor Company's new sedan is less than 32 miles per gallon. What would be the type I error for the test?
  
• Soldering is a method of what?
  
• Question #8ab21