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Think about how correlation is often miscast as causation. That is, cause is attributed to a variable when in fact, there is no causal relationship but only a correlation between the two variables.
Consider any current news articles or media stories (especially political articles or stories) that involve correlations. Select one to use an an example.
Using your example, describe how correlation might be interpreted inappropriately as causation. Also describe the possible explanations for the correlation.
How correlation might be interpreted inappropriately as causation, and the possible explanations for the correlation.
A recent election return indicated that 55% voted for a proposal, 40% voted against it, and 5% abstained. What is the probability that a voter either abstained or voted against the proposal?
The mean amount of a purchase at the Smith Hardware store is $23.50 with standard deviation of $5.00. The amounts purchased follow normal distribution.
For the equation: x = e^-pt (C_1e^qt + C_2e^-qt), where C1 and C2 are arbitrary constants, if I let F = C1 + C2 and G = C1 - C2, how do I obtain:
At Kelsey High School, Mrs. O'brien noted that the students were waiting too long in line for their lunches. After collecting some data, Ms. O'brien determined the mean wait time was 10 minutes.
A statistical study reported that the drug was effective with the p-value of .042. Is this true? The effective sample may be found about 42 times in 1000 samples.
What is coefficient of determination? Calculate F statistic. (Hint: You must complete the table to answer the question.)
For the experiment above, let X denote the number of hearts that are drawn. For this random variable, find its expected value and standard deviation.
30% of college freshmen support increased military spending. If 12 college freshmen are randomly selected, find the probability that more than 5 selected students support increased military spending.
Approximately 34% of all university professors are extroverted Suppose you have classes with 5 Different professors. Find probability that 1 is extroverted? Find probability that 2 are extroverted.
Why is population shape of concern when estimating a mean? What does sample size have to do with it?
USA Today reported on preferred types of office communication by different age groups. Suppose the results were based on a survey of 500 respondents in each age group.
List the steps involved in hypothesis testing using: a) the traditional/classical method; b) the probability-value method. Provide an example of each.
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