Grace Agate

Questions

• A distribution has a standard deviation of #sigma=8#. How do you find the z-score below the mean by 8 points?
• How many election outcomes in the race for class president are there if there are five candidates and 40 students in the class and exactly three candidates tie for the most votes?
• What is the difference between the formulas for the standard deviation of a population and the standard deviation for a sample?
• When can you use a chi-squared test?
• What is meant by the term "least squares" in linear regression?
• What notation is used to designate the expected value of a random variable?
• What does the "least squares" in ordinary least squares refer to?
• According to the following results, what is the probability that a person taking this drug will experience both side effects?
• A spinner has 5 equal sections marked 1 through 5. What is the probability of not landing on 4?
• How do you find the equation of the regression line for the given data?
• For what kind of data would you construct a dotplot or stemplot?
• In how many different orders can Debbie, Brigitte, and Adam wait in line in the school cafeteria? What is the probability that they will be in alphabetical order?
• Why is it possible for a model with a higher R-Squared value to be less accurate?
• What is a bin in a histogram?
• How do you find Z-score on Ti-83 Plus?
• How do you find the z-score for which 98% of the distribution's area lies between -z and z?
• How can a t-statistic be used to determine statistical significance?
• Why is important to perform a hypothesis test about a standard deviation?
• What does a correlation coefficient of -1, 0, and 1 mean?
• In how many ways can you rearrange the letters A, B, C, D, E?
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