D8: What is the relationship between the area in the tail of the standard normal distribution and the
critical value? How do these relate to the width of the confidence interval?
Total area under the standard normal curve is divided into Acceptance region
D1: What is a random variable? What is the difference between a discrete random
variable and a continuous random variable? Provide your own examples of each.
A random variable is a numerical measure of the outcome of a probability experiment,
so its value
D1: Find an image of a Pareto diagram and post this image to the discussion board. Discuss what this
graph is telling us about the data. Include the following in your essay: Is this for qualitative or
quantitative data, how are the bars arranged, and what
D1: What features of a distribution determine whether the mean and the median will be similar? When
does the mean exceed the median? What features of a distribution influence how large the standard
When you have a normally distributed sample
A poll of 100 Canadians asked whether marijuana should be legalized for medical purposes. 72 said definitely yes,
20 said probably, 2 said probably not, 5 said definitely not, and 1 had no opinion. Does this data provide sufficient
evidence that more than
D8: We learn two addition rules this week in the reading.
State both rules.
Rule 1: The Addition Rule for Disjoint Events
Rule 2: The General Addition Rule
P(E or F) = P(E) + P(F)
P(E or F) = P(E) + P(F) P(E-F)
Why are we given two rules?