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Logan took the SAT. Her score was a 1600 out of 2400. The average for the test is a 1700 and the population's standard deviation is 50. what percentile rank of students is Logan in based on her SAT score.
Post-hoc fallacy is that condition where regression shows a high degree of correlation (R square is high), but there is no real cause-effect relationship between the independent and dependent variables.
Calculate a 3-period moving average for period 7. Compute the MAD of the forecast.
To test whether the significant difference between two proportion test using large sample test.
Use the t-distribution table to find the critical value(s) for the indicated alternative hypothesis, level of significance ?, and sample sizes n? and n?.
The analysis needs to be re-run adding the error into the regression sum of squares.
What is the 95% confidence interval for the standard deviation of birth weights at County General Hospital, if the standard deviation of the last 25 babies born there was 1.1 pounds.
What is the probability that the person thinks that "Made in America" ads boost sales and uses social media online?
A manufacturer claims that the mean lifetime, mean, of its light bulbs is 52 months. The standard deviation of these lifetimes is 7 months. Ninety bulbs are selected at random, and their mean lifetime is found to be 55 months.
Find the relative risk for moderate beer drinkers as compared to nondrinkers, finds the 95% confidence interval
The box plots below show the real estate values of single values of single family homes in two neighboring cities, in thousands of dollars.
If you arbitrarily grab 2 socks out of drawer determine the probability that you grab a matching pair?
The proportion of drivers who use seat belts depends on things like age, gender, ethnicity, and local law. As part of a broader study, investigators observed a random sample of 117 female hispanic drivers in Boston
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